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Chapter 5 — Health and Hygiene

Class 8 · Biology

Overview

This unit introduces students to health and hygiene, showing how simple daily habits keep the body, mind and environment healthy. It explains personal hygiene practices such as bathing, handwashing, dental care, hair and nail care, and safe clothing. The unit links food hygiene, balanced nutrition and water safety to prevent common infections and promote growth. It also covers community hygiene: waste disposal, sanitation, control of disease-carrying insects, and the role of schools, families and local agencies in creating a healthy environment. Practical topics such as first aid, safe use of medicines, and basic safety rules are included so students can respond correctly in minor emergencies. Emphasis is on habits that are easy to follow at home and school, and on understanding why these habits matter: to prevent diseases, to protect others, and to build life-long routines. The unit uses clear examples, diagrams students can draw, short activities and questions to check understanding. By the end, learners will know how to keep themselves and their surroundings clean, how to choose safe food and water, how to avoid common health risks, and how to act responsibly when someone is ill. These skills help children stay in school, take part in activities, and develop respect for their own bodies and for public health.

Learning Objectives

  • Identify and explain the importance of personal hygiene practices for daily life.
  • Demonstrate correct methods of handwashing, toothbrushing and basic first aid.
  • Describe how proper food handling and safe water prevent illnesses.
  • Explain the role of sanitation, waste disposal and vector control in community health.
  • Classify common minor health problems and suggest appropriate home care or when to seek medical help.
  • Apply rules of safe clothing, footwear and protective measures during activities.
  • Analyze the links between nutrition, immunity and resistance to infections.
  • Assess simple situations at home or school for health risks and propose hygienic improvements.

Topics in this chapter

12 topics · tap a topic title to jump straight to it.

🩺1

What is Health and Hygiene?

Health means not only the absence of disease but also physical, mental and social well-being. For a child this includes being fit enough to study, play and learn. Hygiene means the set of daily habits and practices that keep the body and environment clean and reduce the chance of getting infections.

Hygiene covers many areas: personal habits such as bathing and washing hands; oral care such as brushing teeth; food hygiene like cooking and storing food safely; and environmental hygiene including clean water, toilets and proper waste disposal. Each of these actions reduces the spread of germs — tiny organisms that cause disease — and breaks the chain of infection. When one link in the chain is broken, the disease cannot spread as easily.

For young students, hygiene is important because it keeps school attendance high and helps concentration. Simple habits at home and school—washing hands, covering food, using toilets properly—make a big difference. Families and schools work together: teachers can explain why habits help, and parents can practice and reinforce them. Good hygiene also supports mental health; a clean body and environment increase confidence and reduce stress.

Understanding reasons helps form habits. Rather than following rules blindly, children should learn how germs travel (through hands, food, water and flies) and how a small action, like covering a food plate or cleaning a wound, protects others as well. This topic builds the foundation for the rest of the unit, where specific practices are described and practised so students can apply them at home and school.

📌 Examples
  • Keeping nails short to stop dirt and germs accumulating under them.
  • Covering food with a clean cloth while serving to prevent flies from landing on it.
📊 Visual ideas
Draw a flow chart titled 'Chain of Infection' showing reservoir (dirty hands) -> transmission (touching food) -> entry (mouth) -> disease.
Draw a Venn diagram showing overlap between personal, food and environmental hygiene.
🔬2

Handwashing: When and How

Handwashing is a simple habit with powerful effects. Hands frequently touch surfaces that carry germs and then touch the face or food, giving germs a route into the body. Regular, proper handwashing prevents many infections such as diarrhoea, cholera and respiratory illnesses like colds and flu.

When to wash: wash hands before and after eating, after using the toilet, after playing outdoors, after touching animals, after coughing or sneezing into hands, before cooking, and after handling raw food. Also wash hands if they look dirty or feel sticky. Teach children to wash at key times so it becomes part of daily routine.

How to wash properly: use clean running water and soap. Wet the hands, apply soap and rub all parts — palms, backs of hands, between fingers, thumbs and under nails — for at least 20 seconds. Singing a short song or counting helps children keep time. Rinse well under running water and dry with a clean towel or allow to air dry. If soap and water are not available, use an alcohol-based hand rub (at least 60% alcohol) but only when hands are not visibly dirty.

Practical tips: set up low-level washing stations in school or home with a water container and soap; use visual posters showing steps; encourage children to carry a small towel or tissue for drying; make handwashing fun by using coloured soaps or stickers as rewards. Emphasise that clean hands protect not only the child but also friends and family by reducing spread of germs.

📌 Examples
  • A school installs a low tap and teaches children to wash hands before lunch, resulting in fewer stomach complaints.
  • Using an alcohol hand rub in the clinic when soap is unavailable reduces germ transfer during quick checks.
📊 Visual ideas
Draw and label the five steps: wet, lather (20 s), scrub, rinse, dry; show hands with soap suds and running water.
🔬3

Dental Care and Oral Hygiene

Oral hygiene keeps the mouth, teeth and gums healthy. Good care prevents tooth decay, gum disease and bad breath, which can cause pain and affect eating and speaking. Starting good habits early protects permanent teeth as a child grows.

Key practices: brush teeth twice daily—once after breakfast and once before sleep—using a soft-bristled toothbrush and fluoride toothpaste. For children, a pea-sized amount of toothpaste is enough. Brush at a slight angle towards the gum line and use short movements to clean the outer, inner and chewing surfaces. Encourage gentle brushing of the tongue to remove bacteria that cause bad breath. Replace toothbrushes every three months or sooner if bristles are worn.

Other important steps: floss between teeth once a day to remove food that a brush cannot reach, especially in older children. Limit sugary snacks and sweet drinks which feed the germs that cause cavities. Rinse the mouth with water after meals when brushing is not possible. Do not share toothbrushes or dental tools. Regular dental check-ups help find problems early and give advice about fluoride and sealants if needed.

Teach children to recognise warning signs: toothache, swelling, pus, bleeding gums or difficulty chewing require dental attention. Manage minor pain at home with a clean rinse and soft food, but seek a dentist for persistent or severe problems. Oral hygiene is part of overall health and links to better concentration and confidence in school.

📌 Examples
  • A student brushes before bed each night to prevent cavities and wakes without bad breath.
  • Parents make a chart to track a child's twice-daily brushing until the habit forms.
📊 Visual ideas
Draw a simple diagram of a tooth showing enamel, dentine and pulp labelled; indicate where cavities start on the enamel and how brushing removes plaque.
🌬️4

Nail and Hair Care

Nails and hair are parts of daily hygiene that are often overlooked but important. Dirt, germs and small parasites can collect under nails and in hair. Keeping nails short and clean, and hair washed and combed, reduces infection risk and improves appearance and confidence.

Nail care: keep fingernails and toenails trimmed short and smooth using clean clippers. Long or jagged nails can scratch the skin and allow dirt to lodge beneath them. During bathing, use a nail brush to clean under nails. Avoid biting nails and picking cuticles because these actions break the skin and allow germs to enter. If nail polish is used, change it regularly and watch for signs of fungal infection — discolouration, thickening or crumbling — and consult a health worker if needed.

Hair care: wash hair regularly with a mild shampoo suitable for the child's scalp. Frequency depends on activity and oiliness; active children may need washing more often. Dry hair well to avoid fungal growth on the scalp. Comb hair daily to remove loose dirt and to spot any lice early. Head lice are common in school children; they spread by close head-to-head contact. If lice are found, inform parents and treat promptly with recommended lice lotion, wash bedding and hats, and avoid sharing combs and caps during treatment.

Be culturally sensitive: hairstyles and coverings vary by family tradition. Focus advice on cleanliness and gentle care, not on style. Teach children to keep personal items like combs, scarves and hair ties separate and clean to reduce the spread of lice and other pests.

📌 Examples
  • Routine: Trimming nails weekly and washing hands removes trapped dirt before meals.
  • If a child has head lice, inform parents, apply treatment and wash bedding to prevent further spread.
📊 Visual ideas
Draw a checklist diagram for weekly personal care: hair wash, comb, check for lice, trim nails, clean combs.
🖐️5

Skin Care and Common Skin Problems

The skin protects the body from entry of germs and from loss of water. Keeping skin clean, dry and protected from injury helps it perform this role well. Simple practices such as regular bathing, using clean clothes, and treating small wounds promptly reduce the risk of infection.

Common skin problems in children include rashes from allergies, fungal infections like ringworm, scabies caused by mites, insect bites, and minor cuts and abrasions. Ringworm appears as round itchy patches with clearer centres; it needs antifungal creams and should not be covered with tight bandages. Scabies causes intense itching and small burrow marks; entire households often require treatment to stop spread. Insect bites usually cause local redness and itching; clean the area, apply a cold compress and a mild antiseptic cream if needed.

For cuts and abrasions: wash with clean water, clean around the wound, apply an antiseptic if available and cover with a sterile dressing. Watch for signs of infection: increasing pain, redness, swelling, pus or fever. Sun protection is also part of skin care — long exposure can cause burns and damage; use hats, clothing and shade during peak sun hours. Avoid harsh soaps and frequent hot water for sensitive or dry skin; instead use mild cleansers and moisturise if skin is dry.

Prevention tips include avoiding sharing towels, clothes and footwear, keeping clothes dry, and seeking medical advice for persistent or spreading rashes. Schools should teach respectful ways to report skin problems so children can get treatment without stigma.

📌 Examples
  • If a child gets a small cut while playing, wash with soap, apply antiseptic and cover with a bandage to prevent infection.
  • A ring-shaped itchy patch on the arm should be seen by a doctor for an antifungal prescription rather than using random ointments.
📊 Visual ideas
Draw a labelled picture showing healthy skin and a small infected area, noting care steps: clean, apply medicine, cover, and observe for infection signs.
🔬6

Clothing, Footwear and Personal Items

Clothing and footwear are the first layer of protection against environmental hazards and infections. Clean clothes help prevent skin problems and reduce transfer of germs. Footwear protects feet from cuts, burns and parasites such as hookworm which can enter through broken skin on bare feet.

Choose clothing appropriate to the weather and activity. Breathable fabrics keep the body cool in hot weather while layers help retain warmth in cold weather. Change out of wet or sweaty clothes immediately after exercise to avoid rashes and fungal growth. Wash undergarments and socks often and dry them fully, preferably in sunlight which reduces damp and kills some germs.

Footwear should fit well and protect the toes and soles. For playing outdoors, closed shoes or sturdy sandals are better than flip-flops to prevent injuries. Inspect shoes regularly and repair or replace when worn. Teach children to keep personal items — towels, combs, toothbrushes, hats — separate and not share them, because sharing spreads lice, fungi and bacteria.

Storage matters: keep school uniforms and sportswear in a separate, clean bag and air out shoes daily. For families with limited resources, encourage simple practices like washing items in hot sun, washing feet daily before bed and drying footwear to reduce infection risk. Discuss cultural clothing choices respectfully and suggest hygiene practices that fit those choices rather than insisting on uniform styles.

📌 Examples
  • Wearing closed shoes while walking to school prevents cuts and reduces risk of soil-borne germs entering the feet.
  • Drying clothes and socks in sunlight reduces dampness and helps kill bacteria and fungi.
📊 Visual ideas
Draw two figures: one wearing clean suitable clothing and shoes and another wearing wet/torn clothing—label the health risks for the latter.
🍲7

Food Hygiene and Nutrition

Food hygiene and nutrition go hand in hand. Safe handling of food prevents infections; balanced nutrition helps the body grow and resist disease. Both are essential for children to learn well and remain healthy.

Food hygiene includes washing hands before handling food, cleaning surfaces and utensils, keeping raw and cooked foods separate, cooking food thoroughly, and storing perishable items in cool, covered containers. Avoid leaving cooked food at room temperature for long periods; bacteria can multiply quickly and cause food poisoning. When the safety of drinking water is uncertain, boil it for at least one minute or use approved water treatment methods. Street food should be chosen carefully—prefer freshly cooked items and avoid food that looks stale or is kept uncovered.

Nutrition means eating a varied diet. A balanced meal contains cereals or grains for energy, pulses/legumes for protein, vegetables and fruits for vitamins and minerals, dairy for calcium, and small amounts of fats. Teach the ‘three-group’ idea: include foods from at least three groups in main meals to cover main nutrient needs. Limit sugary snacks and fizzy drinks because they provide empty calories and cause tooth decay. Encourage regular meals and healthy snacks such as fruits, nuts and milk.

At school, encourage hygienic lunch box practices: wrap food in clean containers, keep raw and cooked separate, and refrigerate perishable items if possible. Nutrition also links to immunity—children with adequate food and essential nutrients recover faster from infections. Use simple classroom activities like planning a balanced plate to teach portion ideas and healthy choices.

📌 Examples
  • A child's lunch box with cooked food kept in an insulated box avoids spoilage during a school day.
  • Including a serving of vegetables and a fruit each day improves vitamin intake and immunity.
🧮 Formulas
  1. Balanced meal rule: Eat from at least three food groups (cereal/pulse/vegetable/fruit/dairy) at each main meal when possible.
📊 Visual ideas
Draw a simple plate divided into sections to show portions: grains, vegetables, protein, fruit, dairy; label one example food for each section.
💧8

Safe Water and Sanitation

Safe water and proper sanitation are among the most important foundations of public health. Contaminated water and poor sanitation cause many illnesses, including diarrhoea, cholera and typhoid, which disproportionately affect children. Ensuring safe water and toilets protects families and communities.

Safe water means water free from harmful germs and hazardous chemicals. Pipelines, protected wells, boreholes and covered storage containers reduce contamination. Where water safety is uncertain, boil water for at least one minute, use household water filters or treat with recommended chlorine tablets, following instructions carefully. Store water in clean, covered containers and use a clean ladle to remove water; do not dip hands or cups directly into storage vessels.

Sanitation means safe disposal of human faeces so it does not contaminate the environment. Using toilets or latrines, keeping them clean, and ensuring handwashing facilities near toilets are vital. Open defecation contaminates soil and water sources, spreading disease. Schools should provide separate, private and usable toilets for boys and girls and ensure water for flushing and cleaning. Menstrual hygiene management is part of sanitation: girls need privacy, water, soap and safe disposal facilities.

Community actions include protecting water sources from pollution, reporting broken pumps or clogged drains, and supporting construction of toilets. Simple household actions—regularly cleaning the toilet, fixing leaky pipes and covering stored water—make a big difference in reducing disease and keeping children in school.

📌 Examples
  • Boiling water at home for one minute before drinking when the source is questionable prevents many infections.
  • A school with functioning toilets and handwashing stations reports fewer student illnesses and better attendance.
📊 Visual ideas
Draw a diagram showing a protected well with a cover and a separate storage container at home with a lid and ladle; label steps for safe drawing of water.
🔬9

Waste Management, Vector Control and Household Cleanliness

Proper waste management, household cleanliness and vector control are three linked practices that protect family and community health. Waste left in the open, blocked drains and piles of clutter provide food and shelter for flies, rodents and mosquitoes. These animals carry germs that cause diseases such as diarrhoea, dengue, malaria and leptospirosis. By managing waste and keeping surroundings clean, families reduce the places where vectors thrive and lower disease risk.

Start at home: separate waste where possible into biodegradable (wet) and non-biodegradable (dry) items. Wet waste such as vegetable peels and leftover food can be composted in a covered pit, which reduces the amount of garbage and produces fertiliser for plants. Dry waste—plastics, glass and metal—should be collected separately for recycling or safe disposal by municipal services. Keep indoor and outdoor dustbins covered to stop flies from laying eggs and to reduce bad smells that attract pests.

Kitchen cleanliness is essential: wash dishes and utensils promptly, clean chopping boards and work surfaces with detergent, and keep food covered to prevent flies from landing. Dispose of leftover food in a timely manner and avoid throwing waste into drains where it can block water flow. Clogged drains become breeding sites for mosquitoes and produce foul odours that attract rodents.

Vector control focuses on removing breeding sites and denying access to pests. Empty standing water from pots, tyres, buckets and flower vases weekly; change water in birdbaths and plant trays regularly. Use mosquito nets and window screens to prevent bites indoors and apply safe repellents when needed. To control rodents, seal holes in walls and store grains in tightly closed containers; avoid leaving food scraps on the floor and keep storage areas tidy. For flies, ensure windows and doors have screens when possible, and keep food covered during preparation and serving.

Community work strengthens household action: participate in neighbourhood clean-up drives, report illegal dumping and help clear clogged public drains. Municipal services should collect segregated waste regularly and maintain public toilets. Schools can teach children to sort waste and run composting projects, and neighbourhood groups can organise awareness drives on clearing vector breeding sites. When everyone plays a part, the combined effect reduces disease, improves the environment and makes the area safer and more pleasant to live in.

📌 Examples
  • Composting vegetable peels at home reduces the amount of waste and produces useful soil for plants.
  • Emptying a discarded tyre that collects rainwater prevents mosquito breeding near homes.
📊 Visual ideas
Draw a house compound showing sources of standing water (bucket, tyre) crossed out and show covered water storage, sealed food containers and a covered dustbin.
💊10

First Aid and Safe Use of Medicines

First aid is the immediate care given before professional help arrives. Knowing basic first aid reduces risks of complications from injuries and common emergencies. For children, practical simple steps are most useful and should always be taught with safety and adult supervision in mind.

Start by assessing safety: do not put yourself in danger. Call for adult help and emergency services if needed. For bleeding, apply firm pressure with a clean cloth until bleeding slows, then clean around the wound with soap and water and cover with a sterile dressing. For burns, cool the burned area under running water for at least 10 minutes and avoid applying home remedies like butter or toothpaste. For nosebleeds, sit upright and lean forward, pinch the soft part of the nose for about 10 minutes and breathe through the mouth; seek help if bleeding continues.

For choking, if the person can cough speak encourage coughing; if airway is blocked and the person cannot breathe, trained adults should perform back blows or abdominal thrusts. For fainting, lay the person flat and raise their legs to improve blood flow to the brain; loosen tight clothing and seek medical help if consciousness does not return quickly. Teach basic wound care: clean, cover and seek professional help for deep wounds, animal bites or foreign objects in wounds.

Safe use of medicines: only take medicines prescribed by a qualified person and follow the correct dose and duration. Keep medicines out of reach of children and store them as instructed. Never share prescribed antibiotics and do not stop a course early even if symptoms improve. Teach children to tell an adult before taking any medicine and to complete any course given by a doctor. A stocked first aid kit and a clear plan at school or home help manage minor emergencies promptly and safely.

📌 Examples
  • If a child falls and has a small cut, wash with clean water, apply mild antiseptic and cover with a bandage.
  • Do not give aspirin to children with fever unless prescribed; use recommended medicines and correct dose.
📊 Visual ideas
Draw the steps of a simple first aid flow: ensure safety -> call for help -> basic care (stop bleeding, cool burns, treat for shock) -> seek medical care.
🔬11

Common Childhood Illnesses and Prevention

Children commonly face infections such as colds, influenza, diarrhoea, chickenpox, skin infections and sometimes more serious illnesses. Many are mild and respond to home care, while others require medical attention. Prevention and early recognition are the best strategies to reduce harm.

Prevention begins with vaccination. Follow the national immunisation schedule to protect children from diseases such as measles and tetanus. Good hygiene — handwashing, safe food and water, clean surroundings — reduces risks for diarrhoea, eye infections and respiratory illnesses. Nutrition plays a major role: well-nourished children recover faster and resist infections better.

Home care: for fever, provide fluids, rest and fever-reducing medicines as advised; for diarrhoea, give oral rehydration solution (ORS) frequently to prevent dehydration and continue feeding nutritious food. For skin infections, keep the area clean and avoid sharing personal items; seek medical advice for persistent or spreading conditions. For chickenpox and measles, isolate the child during the infectious period to protect classmates and siblings.

Recognise danger signs that require urgent care: difficulty breathing, persistent vomiting, inability to drink, signs of severe dehydration (dry mouth, sunken eyes, very little urine), seizures, high fever not responsive to medicine, or unusual drowsiness. Schools should have clear protocols for when to send a child home and when to contact parents or health services. Encourage reporting of symptoms early so outbreaks can be detected and controlled.

📌 Examples
  • A child with diarrhoea is given ORS and encouraged to drink frequently; if urine output drops or the child is drowsy, seek medical help.
  • If a child develops chickenpox, isolate until all blisters are dry to prevent infecting classmates.
📊 Visual ideas
Draw a chart listing common symptoms (fever, cough, diarrhoea) with columns for home care, warning signs, and when to see a doctor.
🩺12

School and Community Role in Health and Public Systems

Health is a shared responsibility. Families, schools, local government and health services together create a healthy environment. Schools are especially important because they reach many children and can teach, model and support healthy habits. When schools and communities work together, basic problems such as unsafe water, broken toilets and vector breeding sites are identified and fixed faster, reducing disease and absenteeism.

At school, routines such as handwashing before meals, keeping classrooms clean, providing safe drinking water and ensuring functional toilets reduce illness and absenteeism. A well-maintained first aid kit, simple health records and clear rules for when sick children must stay home are useful. Health education lessons should explain why behaviours matter and include demonstrations, posters and student activities like handwashing drills, hygiene clubs or class charts to promote habits. Schools can also run weekly checks for cleanliness and report maintenance needs promptly.

Communities and public health systems provide essential services: vaccination campaigns, treated water supply, sewage systems, municipal waste collection and disease surveillance. Local health centres and workers offer immunisations, basic treatment and public health advice; they also organise outreach campaigns during outbreaks. Community actions—participating in sanitation programmes, reporting broken pumps or open drains, and joining mosquito control activities—support these services and strengthen local health security.

Students can act as hygiene ambassadors by sharing messages at home, participating in cleanliness drives and helping maintain school facilities. Encourage respectful communication between parents, teachers and local authorities so problems like lack of toilets or contaminated water are raised constructively. Knowing where to seek help—school nurse, local clinic, municipal office—empowers families to act early. When students, families, schools and public systems cooperate, communities become healthier and safer places for children to grow and learn.

📌 Examples
  • A neighbourhood group organises a monthly clean-up near a pond to reduce mosquito breeding and improve safety.
  • Parents attend a school meeting where a health worker explains the benefits of the local vaccination drive.
📊 Visual ideas
Draw a simple map showing household, school and local clinic linked by arrows to show community health actions and responsibilities.

Key Concepts

Hygiene
Practices and conditions that help maintain health and prevent disease.
Personal hygiene
Daily habits a person follows to keep their body clean and healthy.
Handwashing
Cleaning hands with soap and water to remove germs and prevent disease transmission.
Balanced diet
A meal plan that includes the right amounts of different food groups for growth and health.
Sanitation
The safe management of human waste to avoid contamination of the environment.
Safe water
Water that is free from harmful microbes and chemicals and is fit for drinking and cooking.
Vector
An organism, like a mosquito, that carries and spreads disease-causing agents.
First aid
Immediate care given to a sick or injured person before professional treatment.
Antibiotic
A medicine used to treat bacterial infections, to be used as prescribed by a doctor.
Dehydration
A dangerous loss of body water often caused by severe diarrhoea or vomiting.
Vaccination
A healthy practice of giving a vaccine to build immunity against specific diseases.
Waste segregation
Separating wet and dry waste to enable proper disposal or recycling.
Composting
Turning biodegradable waste into nutrient-rich soil conditioner through decomposition.
Antiseptic
A substance applied to wounds to prevent infection.
Oral rehydration solution (ORS)
A safe mixture of salts and sugar in water used to treat dehydration from diarrhoea.

Practice Questions

  1. Why is handwashing important before meals? / भोजन से पहले हाथ धोना महत्वपूर्ण क्यों है?
    Show answer

    Handwashing removes germs from hands that can cause diarrhoea and other infections when transferred to food; it reduces the risk of illness and keeps the whole family healthy. / हाथों से खाना खाते समय या भोजन को छूते समय रोगजनक आ सकते हैं जो दस्त और अन्य संक्रमण पैदा कर सकते हैं; हाथ धोने से यह जोखिम कम होता है और परिवार स्वस्थ रहता है।

  2. Describe three steps to care for a small cut at home. / घर पर छोटे कट की देखभाल के तीन चरण बताइए।
    Show answer

    Wash the cut with clean water and soap to remove dirt; apply an antiseptic and press to stop bleeding if needed; cover with a clean bandage and keep it dry, changing the dressing when it is dirty. / कट को साफ पानी और साबुन से धोएं ताकि गंदगी हटे; एंटीसेप्टिक लगाएँ और यदि खून बह रहा हो तो दबाव डालकर रोकें; स्वच्छ पट्टी से ढकें और उसे सूखा रखें, जब वह गंदा हो तब बदलें।

  3. List four practices that keep food safe at home. / घर पर भोजन सुरक्षित रखने के चार अभ्यास लिखिए।
    Show answer

    Wash hands and cooking surfaces; cook food thoroughly; separate raw and cooked food; store perishable food in cool, covered containers. / हाथों और रसोई की सतहों को धोना; भोजन को अच्छी तरह पकाना; कच्चे और पके हुए भोजन को अलग रखना; नाशवान वस्तुओं को ठंडे, ढके हुए कंटेनरों में रखना।

  4. What are vectors? Give two examples and one method to control them. / वेक्टर क्या होते हैं? दो उदाहरण दें और उन्हें नियंत्रित करने का एक तरीका बताइए।
    Show answer

    Vectors are animals that transmit disease agents between people. Examples: mosquitoes and flies. Control method: remove standing water and keep surroundings clean to prevent mosquito breeding. / वेक्टर ऐसे जीव होते हैं जो लोगों के बीच रोगजनक फैला सकते हैं। उदाहरण: मच्छर और मक्खियाँ। नियंत्रण का तरीका: खड़े पानी को हटाएँ और आसपास साफ रखें ताकि मच्छर पनप न सकें।

  5. How does safe water prevent illness? / सुरक्षित पानी किस प्रकार बीमारी रोकता है?
    Show answer

    Safe water is free from harmful microbes and chemicals that cause water-borne diseases; using treated or boiled water prevents infections like diarrhoea and typhoid. / सुरक्षित पानी हानिकारक कीटाणुओं और रसायनों से मुक्त होता है जो जलजनित रोग पैदा करते हैं; इलाज किया हुआ या उबला हुआ पानी उपयोग करने से दस्त और टाइफायड जैसे संक्रमण रोकें जाते हैं।

  6. Explain why schools need separate toilets for boys and girls. / बताइए कि स्कूलों में लड़कों और लड़कियों के लिए अलग शौचालय क्यों आवश्यक हैं।
    Show answer

    Separate toilets provide privacy and dignity, encourage girls to attend school especially during menstrual periods, and reduce discomfort or bullying; they also help maintain hygiene by allocating resources appropriately. / अलग शौचालय गोपनीयता और गरिमा देते हैं, विशेषकर मासिक धर्म के दौरान लड़कियों को स्कूल आने के लिए प्रोत्साहित करते हैं, असुविधा या बुलिंग को कम करते हैं; वे संसाधनों को सही तरीके से आबंटित कर स्वच्छता बनाए रखने में मदद करते हैं।

  7. A child has diarrhoea. What immediate care should you give at home? / किसी बच्चे को दस्त हो गए हैं। घर पर तुरंत क्या देखभाल देनी चाहिए?
    Show answer

    Give frequent small sips of safe fluids and an oral rehydration solution (ORS) to prevent dehydration; continue feeding usual food and seek medical help if there is high fever, blood in stool or signs of severe dehydration. / निर्जलीकरण रोकने के लिए सुरक्षित तरल पदार्थ और ओआरएस के छोटे-छोटे घोंट दें; सामान्य भोजन करना जारी रखें और यदि तेज बुखार हो, मल में खून हो या गंभीर निर्जलीकरण के लक्षण हों तो चिकित्सकीय सहायता लें।

  8. Name two household practices that reduce rodent problems. / चूहों की समस्या कम करने के दो घरेलू उपाय बताइए।
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    Store food in sealed containers and remove clutter and piles of unused material where rodents can nest; seal holes and cracks in walls and floors to prevent entry. / भोजन को बंद ढक्कन वाले कंटेनरों में रखें और उन जगहों से अव्यवस्था हटाएँ जहाँ चूहे बसेरा कर सकते हैं; दीवारों और फर्श में छेदों को सील कर प्रवेश रोकें।

  9. What should you do if you find a classmate with head lice? / यदि किसी सहपाठी में सिर में जूँ मिलें तो क्या करना चाहिए?
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    Inform a teacher or parent privately so the child can receive treatment; avoid sharing combs and hats and check other close contacts at home and school. / निजी रूप से शिक्षक या माता-पिता को सूचित करें ताकि बच्चे का उपचार हो सके; कंघी और टोपी साझा करने से बचें और घर तथा स्कूल में निकट संपर्कियों की जांच कराएँ।

  10. Why is vaccination important for children? / बच्चों के लिए टीकाकरण क्यों महत्वपूर्ण है?
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    Vaccination builds immunity against serious diseases and reduces the chance of outbreaks; it protects the child and helps protect the community by limiting disease spread. / टीकाकरण गंभीर रोगों के खिलाफ प्रतिरक्षा बनाता है और प्रकोप की संभावना को कम करता है; यह बच्चे की रक्षा करता है और रोग के फैलाव को सीमित करके समुदाय की भी सुरक्षा करता है।

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