Chapter 5 — Health and Hygiene

Health is more than not being sick; it is a balanced state of physical strength, mental calm and good social relationships. Physical health means the body works well: heart, lungs, muscles and organs are healthy. Mental health means feeling able to cope with thoughts and emotions and being able to learn and play. Social well-being means having caring relationships at home, school and in the community.

Hygiene is the set of daily practices that keep the body and surroundings clean to prevent infection and illness. Personal hygiene focuses on what each person does: washing hands, bathing, brushing teeth, trimming nails and keeping hair clean. Environmental hygiene covers how families and communities manage water, food, waste and toilets to stop germs from spreading. Both personal and environmental hygiene together support good health.

Why hygiene matters: germs are often invisible, and many illnesses spread through simple contact with contaminated hands, food or water. Small actions taken every day—washing hands before eating, covering mouth while coughing, storing water in covered containers—break the chain that allows germs to move from person to person. Good hygiene reduces missed school days and supports growth and learning by keeping children well enough to attend school regularly.

Creating habits: routines and reminders help children learn hygiene. Adults model behaviour, and schools provide facilities such as clean toilets and soap. Teaching hygiene also includes respect for others: not spitting, not sharing toothbrushes, and keeping communal areas clean.

Health promotion: hygiene combines prevention and care. Vaccination and safe food reduce disease risk, while support for mental health and balanced nutrition help the body resist infections. Understanding health and hygiene empowers students to take responsibility for themselves and protect the community.

Germs are tiny living organisms that can cause disease; they include bacteria, viruses, fungi and protozoa. Bacteria are single-celled organisms that can grow on their own in food, water or the body. Some bacteria are helpful (in digestion) while others cause infections like strep throat or food poisoning.

Viruses are much smaller than bacteria and need living cells to multiply. Common viral infections include the common cold, flu and chickenpox. Fungi include moulds and yeasts; they cause skin infections like ringworm or athlete's foot. Protozoa are single-celled organisms often found in contaminated water and can cause diseases like amoebic dysentery.

Each type of germ has characteristics that affect how it spreads and how we prevent it. Bacteria may be killed by many antibiotics, but viruses are not helped by antibiotics; viral infections may need rest, fluids and sometimes antiviral medicines. Fungi often respond to antifungal creams. Some germs form spores or stages that survive for long periods in the environment.

Knowing the type of germ helps decide treatment and prevention. For instance, water purification prevents protozoal and bacterial infections; vaccination helps prevent many viral and bacterial diseases. Simple hygiene like handwashing, safe food storage and clean water reduce exposure to all types of germs. Understanding germs promotes careful behaviour around food, animals and sick people, reducing spread in schools and homes.

Diseases spread when germs move from their source to a new person. Knowing the main modes of transmission helps us choose the right prevention steps. The commonly recognised routes are direct contact, indirect contact, airborne transmission, droplet spread, water-borne and food-borne transmission, and vector-borne transmission.

Direct contact occurs when a healthy person touches an infected person, for example by shaking hands, hugging, or touching wounds. Skin infections and some respiratory infections spread this way. Indirect contact happens when germs are left on objects (fomites) such as toys, towels, utensils or door handles; a person picks up germs by touching these objects and then touching their face.

Airborne transmission involves very small particles that remain suspended in air for long periods; these can travel further in closed spaces. Diseases like tuberculosis can spread this way. Droplet spread involves larger respiratory droplets from coughs and sneezes; these travel only short distances and land on surfaces or directly on another person’s nose or mouth, causing infection.

Water-borne transmission results from drinking or using water contaminated with germs such as bacteria or protozoa, causing diarrhoeal diseases. Food-borne infections arise from contaminated or poorly cooked food where germs multiply. Vector-borne transmission involves insects or animals—such as mosquitoes or flies—that pick up germs from one host and transfer them to another; malaria and dengue are examples.

Some infections use multiple routes. For example, a person with diarrhoea can contaminate hands that then contaminate food, leading to food-borne spread. Breaking transmission chains requires targeted measures: handwashing and surface cleaning reduce direct and indirect spread; covering mouths and isolation reduce droplet spread; boiling or treating water stops water-borne disease; cooking and food hygiene prevent food-borne infection; removing standing water and using nets control vectors.

In crowded places like schools, combining measures—good hand hygiene, clean classrooms, safe water and cough etiquette—gives the best protection. Teaching children how germs move and what simple action stops them empowers families and communities to prevent outbreaks before they start.

Personal hygiene includes regular actions that keep the body clean and reduce disease risk. Key practices are handwashing, bathing, oral care, nail care and safe hair care. Each practice has methods and a reason.

Handwashing is the most important habit. Use soap and running water, scrub palms, backs of hands, between fingers and under nails for at least 20 seconds, then rinse and dry. Wash hands before eating, after using the toilet, after playing outside, and after handling animals. If water is not available, use an alcohol-based sanitizer.

Bathing removes sweat, dirt and germs from the skin. Clean clothes and regular bathing reduce skin infections and body odour. Oral hygiene means brushing teeth twice a day and cleaning the tongue; this prevents cavities and gum disease. Trim nails regularly and keep them clean to avoid hiding germs under nails. Hair should be washed periodically and combed; keep long hair tied back during food preparation.

Good hygiene also includes using clean utensils, avoiding sharing toothbrushes or towels, and wearing clean socks and footwear to prevent fungal infections. Teach by routine: establish set times for brushing and bathing. Parents and teachers should supervise younger children until the habits are established. Simple checks—clean nails, fresh breath, regular handwashing—show that a child cares for personal health and helps protect classmates and family members from infections.

Food hygiene and safe water are essential to prevent food-borne and water-borne illnesses. Food can become contaminated at any stage: growing, harvesting, storage, preparation or serving. To keep food safe, wash fruits and vegetables, cook food thoroughly, avoid cross-contamination (use separate cutting boards for raw meat and vegetables), and store perishable items in a cool place.

Leftover food should be reheated properly and not kept at room temperature for long. Avoid street food that looks unclean or has been kept uncovered. Cover food to prevent flies from landing on it. Use clean utensils and wash hands before handling food. Teach children to refuse food that smells bad or looks spoiled.

Safe drinking water means water free from disease-causing germs and harmful chemicals. If the source is uncertain, boil water for at least one minute or use appropriate filtration or chlorination. Store water in clean, covered containers and draw water with a clean cup, not by dipping hands or dirty vessels. Protect water sources from pollution and do not wash clothes or defecate near wells or pumps.

At home and school, provide separate bins for wet and dry waste, and dispose of garbage regularly. Awareness about food hygiene and careful water practices reduce the risk of diarrhoea, typhoid and other infections common among children. Building these habits helps families stay healthy and prevents community outbreaks.

Nutrition is about providing the body with the right types and amounts of food to grow, be active and fight infection. A balanced diet includes carbohydrates, proteins, fats, vitamins, minerals and water in suitable proportions. Carbohydrates and fats are the main energy sources. Proteins build and repair body tissues such as muscles and help make enzymes and antibodies. Vitamins and minerals support growth, vision, immunity and bone health. Water is vital for digestion, temperature control and carrying nutrients.

Children need varied foods because no single food contains all nutrients. Cereals and grains supply energy; pulses, eggs, milk and meat supply proteins; fruits and vegetables give vitamins and fibre; nuts and oils provide healthy fats. Iron-rich foods (green leafy vegetables, legumes, meat when available) prevent anaemia which causes tiredness and poor concentration. Calcium from milk and dairy supports strong bones and teeth.

Meal patterns matter: regular meals and healthy snacks keep energy steady and help concentration at school. Avoid excessive sugar, salty snacks and fried foods which can cause dental problems and weight gain. Portion sizes should match age and activity—active children need more energy. Malnutrition can be undernutrition (deficiency of calories or nutrients) or overnutrition (excess calories), both harming health and school performance.

Simple practical advice helps families and schools: include a vegetable and fruit daily, combine cereals with pulses for a complete protein, choose water over sugary drinks, and ensure regular meals with a mix of food groups. School meal programmes and nutrition education promote balanced eating and support children who may not receive adequate nutrition at home. Understanding nutrition helps students make healthy choices that support growth, learning and lifelong health.

Physical activity, good sleep and positive mental health are three parts of a healthy life that support each other. Exercise keeps the heart and lungs strong, tones muscles, controls weight and improves mood by releasing chemicals in the brain that reduce stress and increase happiness. Children should have at least 60 minutes of moderate to vigorous play each day such as running, cycling, sports or active games. Even simple daily routines like walking to school or playing in the park add up.

Sleep is the time when the body repairs tissues and the brain processes learning and memories. School-age children usually need around 9–11 hours of sleep each night. Good sleep habits include a fixed bedtime, a calm bedtime routine, a dark and quiet sleeping place, and avoiding screens at least an hour before bed. Poor sleep makes it harder to pay attention in class, increases mood swings and lowers resistance to infections.

Mental health means feeling able to cope with daily life, to express feelings, ask for help and enjoy friendships. Stress, anxiety and bullying at school can harm mental health. Simple practices help maintain it: regular physical activity, adequate sleep, talking with trusted adults or friends about worries, practising relaxation such as deep breathing, and engaging in creative activities and hobbies. Schools that teach emotional skills and build supportive classrooms help children feel safe and learn better.

Balance across these areas matters: exercise improves sleep; good sleep supports mood and learning; emotional support helps children take part in play and school. Communities and families can support healthy routines by encouraging outdoor play, limiting late-night screen use, promoting kindness and providing time for rest and fun. Teaching these connections helps students make daily choices that protect both body and mind.

This topic describes common infectious diseases in children, their signs and how to prevent them. Communicable diseases include those caused by bacteria, viruses, fungi or protozoa and spread from person to person or through contaminated food, water and vectors. Common examples in school-age children are colds and coughs, influenza, diarrhoea, chickenpox, measles, skin infections like impetigo, scabies and ringworm. Typical signs include fever, cough, sore throat, rashes, stomach pain, vomiting and loose stools. Prompt recognition helps reduce complications and stop spread.

Prevention is based on breaking the chain of infection. Vaccination is a key prevention tool for diseases like measles and diphtheria; it protects the vaccinated child and reduces transmission in the community. Handwashing with soap at critical times—after using the toilet and before eating—reduces many infections. Safe food handling, clean water, and good sanitation prevent diarrhoeal diseases. For respiratory infections, coughing into a tissue or elbow, wearing masks when advised, and keeping sick children at home until they are less contagious reduce spread in classrooms.

Environmental actions also matter: keeping toilets and play areas clean, frequent removal of garbage, and controlling vectors such as mosquitoes and flies cut disease risk. For diarrhoea, oral rehydration solution (ORS) and continued feeding help prevent dehydration; severe or persistent cases need medical attention. For skin infections, avoid sharing towels or clothing and seek treatment early. Schools should maintain policies for sick children, encourage vaccination record keeping and organise health check-ups.

Education empowers students: teaching symptoms, prevention steps and simple home-care measures helps families respond quickly. Community participation in vaccination camps, sanitation improvements and awareness campaigns reduces the likelihood of outbreaks and ensures children stay healthy and in school.

Non-communicable diseases (NCDs) are illnesses that do not spread from person to person. Examples include diabetes, heart disease, high blood pressure and obesity. While these conditions most often appear in adulthood, the habits we form as children—what we eat, how active we are, and whether we use tobacco—strongly influence future risk. Teaching children about NCD prevention helps build a foundation for lifelong health.

Major risk factors are unhealthy diet (excessive sugar, salt and fats), physical inactivity, tobacco use and exposure to second-hand smoke. Stress, poor sleep and too much screen time also contribute to unhealthy patterns. Simple preventive steps include eating a balanced diet with plenty of fruits and vegetables, limiting fried and sugary foods, drinking water instead of sugary drinks, and taking part in regular physical activity like sports, cycling or brisk walking. Avoiding tobacco and refusing to try harmful substances is vital.

Monitoring growth and discussing healthy weight in a supportive way can help detect problems early. Teachers and health workers can measure height and weight to check growth trends and provide guidance to families when needed. Schools can create healthy environments by offering nutritious cafeteria options, limiting unhealthy snacks during events and providing daily physical education. Mental health support—teaching coping skills, time management and stress relief—also reduces behaviours that lead to NCD risk.

Primary prevention in childhood reduces the future health burden. Understanding that choices made today affect tomorrow helps students take responsibility for their habits. Community actions such as smoke-free public spaces, safe playgrounds and nutrition education reinforce healthy choices and protect children from long-term disease risks.

School hygiene and sanitation create a healthy environment that supports learning and reduces illness. Clean classrooms, safe toilets, accessible handwashing facilities and safe drinking water are the basic requirements. Functioning toilets that are gender-sensitive and private encourage regular use; handwashing stations with soap and water near toilets and the canteen reduce germ spread. Regular sweeping, dust removal and proper ventilation lower the risk of respiratory problems.

Waste management is part of sanitation: separate collection of wet and dry waste, covered bins, and regular removal prevent pests and smells. Food handling in the school canteen should follow hygiene rules—clean surfaces, properly stored ingredients and well-cooked meals. Schools should keep records of cleaning schedules and ensure supplies like soap, detergent and disinfectants are available.

Student participation helps maintain hygiene. Forming student health clubs or committees gives pupils responsibility for cleanliness drives, watering plants, and monitoring toilets and handwashing points. Education about not spitting, using dustbins and reporting broken facilities builds a culture of care. Schools should also teach menstrual hygiene and provide private disposal options for sanitary materials so girls can attend school with dignity.

Sanitation extends to safe play areas and well-maintained equipment to reduce injuries. Regular health screenings, vaccination drives and basic first-aid provision at school detect and manage health issues early. Emergency plans for outbreaks or injuries—clear communication, isolation procedures and liaison with local health services—protect children and staff.

Combining infrastructure, regular maintenance and student involvement makes school hygiene sustainable. When schools invest in sanitation and hygiene education, attendance rises and learning improves because children remain healthier and more able to participate fully in school life.

First aid means the immediate care given to an injured or sick person before professional medical help arrives. Knowing basic first-aid for minor injuries empowers students to act calmly and safely. Important items in a first-aid kit include bandages, sterile gauze, antiseptic lotion, adhesive tape, scissors and a thermometer.

For cuts and grazes: wash hands, clean the wound with clean water, apply antiseptic, and cover with sterile dressing. For nosebleeds: have the person sit up, lean forward slightly, pinch the soft part of the nose and breathe through the mouth until bleeding slows; avoid tilting the head back. For burns: cool the burn under running water for 10–15 minutes, do not apply ice, and cover loosely with a clean cloth; seek medical help for larger burns. For sprains: apply rest, ice, compression and elevation (RICE) to reduce swelling.

Do not give medicines to others without adult permission. For fainting, check responsiveness, loosen tight clothing and raise the legs if breathing is normal. In case of choking, encourage coughing; if the person cannot breathe, trained adults can perform back blows and abdominal thrusts. Always seek help from a teacher or health worker when unsure.

Teaching practical first-aid builds confidence, reduces panic and decreases harm from minor accidents at home or school. Emphasis must be on safety, cleanliness and seeking professional care when needed.

Immunisation is one of the most effective public health tools for preventing serious infectious diseases. Vaccines train the immune system by exposing it to inactive or weakened parts of germs so that the body learns to recognise and fight those germs in future. Common childhood vaccines protect against illnesses such as polio, measles, diphtheria, tetanus and whooping cough. Timely vaccination according to recommended schedules gives the best protection, especially in early life when children are most vulnerable.

Preventive health care also includes regular health check-ups, growth monitoring, dental checks, deworming and health education. Growth monitoring (measuring height and weight) helps detect undernutrition or excessive weight gain early so that dietary and lifestyle changes can be made. Dental check-ups prevent cavities and teach oral care. Deworming reduces intestinal infections that cause poor appetite and anaemia and improves school performance.

Completing vaccine schedules and attending health camps at school or community centres increases coverage and builds herd immunity, which protects individuals who cannot be vaccinated for medical reasons. Keeping vaccination records and informing health workers about missed doses ensures children receive catch-up vaccines. Preventive care also includes promoting healthy habits: handwashing, safe water and sanitation, clean food practices and vector control. These measures work together to reduce illness and support stronger immunity.

Health education empowers families to seek care early when warning signs appear—persistent fever, difficulty breathing, prolonged diarrhoea or poor feeding—and to follow advice about when to consult health professionals. Schools and local health services often collaborate to provide immunisation drives, screening and counselling, making preventive health accessible and effective for children and their communities.

Environmental health studies how surroundings affect people’s well-being and how to reduce risks from the environment. Many infections are linked to poor environmental conditions such as polluted water, accumulated garbage and sites where vectors breed. Vector control aims to reduce animals and insects that carry disease—mosquitoes, flies and rodents being the most common. Effective environmental measures prevent these vectors from finding places to live and lay eggs.

Mosquito control begins with removing standing water where they breed: emptying containers, covering water storage, cleaning blocked drains and ensuring gardens do not hold puddles. Using window screens, bed nets and mosquito repellents reduces bites. Flies are attracted to uncovered food and garbage; keeping waste in closed bins, promptly removing garbage and maintaining clean latrines reduce fly numbers and the diseases they spread. Rodents are controlled by good food storage, sealing cracks in walls and safe trapping where necessary.

Community actions magnify household efforts. Organised clean-up drives, clearing drains before rains, educating households on waste segregation, and maintaining public parks reduce vector habitats. Chemical control such as fogging or larvicides is used selectively under public health guidance; it works best when combined with environmental cleanup for lasting impact.

Schools can play a strong role by keeping grounds tidy, ensuring no stagnant water on premises, covering water tanks and teaching students about safe garbage disposal. Monitoring and reporting breeding sites to local health authorities helps control vectors at a larger scale. Environmental health connects daily habits to public safety: small preventive steps by many households protect entire communities from outbreaks like dengue, malaria and other vector-borne diseases.

Emergencies such as floods, earthquakes or disease outbreaks create conditions where hygiene becomes critical. In such situations, crowded shelters, interrupted water supplies and damaged sanitation services increase the risk of diarrhoeal and respiratory infections. Knowing practical hygiene measures for emergencies protects families and communities. Preparation is the first step: keep a basic emergency hygiene kit with soap, hand sanitiser, clean water containers, ORS packets, sanitary supplies and a basic first-aid kit.

During floods, water sources may be contaminated with sewage and chemicals; always use boiled or treated water for drinking and cooking. Avoid raw foods that cannot be washed or cooked; use covered containers for food and water. Temporary toilets or latrines with safe waste disposal prevent contamination of shared spaces and water sources. Encourage handwashing after using shared toilets and before eating.

In outbreaks of infectious disease, follow public health guidance: isolate sick persons if advised, maintain physical distance when recommended, wear masks if required, and seek testing or medical care as instructed. Schools should communicate clearly with parents about closures, hygiene measures and how families can keep children safe. Mental health support is important because emergencies cause stress; talking to family members, keeping routines for children and providing calm reassurance help recovery.

Community coordination—organising clean-up teams, ensuring waste is removed, setting up safe water distribution and establishing hygiene promotion—reduces spread of diseases. After an emergency, rebuild safe sanitation facilities and restore clean water access quickly. Teaching children emergency hygiene measures—how to use ORS, safe handling of water, and how to keep shelters clean—gives them practical skills to protect themselves and support others during difficult times.