Practical Answers for Everyday Independence

Preventing the Spread of Germs & Illness

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Category: Health & Safety

Preventing the Spread of Germs & Illness

Germs are part of everyday life. They can spread through the air, on hands and surfaces, through food and water, and during close contact with another person. You cannot remove every germ from your home, and you do not need to. The goal is to use practical habits that reduce the chance of harmful germs moving from one person to another.

The most effective habits are usually simple: wash your hands at the right times, cover coughs and sneezes, keep frequently touched areas clean, handle food safely, improve indoor airflow, stay home when you are sick, and take extra precautions around people who are more likely to become seriously ill.

Good hygiene is not about making a home perfectly sterile. It is about interrupting the ways illnesses commonly spread.

Understanding How Germs Spread

Different germs spread in different ways.

Through the air

Respiratory viruses can spread when an infected person:

  • Breathes
  • Talks
  • Coughs
  • Sneezes
  • Sings

Risk may be higher during close contact and in crowded indoor spaces with limited airflow.

Through hands and surfaces

Germs can move from a contaminated person, object, or surface to someone’s hands. The person may then touch their:

  • Eyes
  • Nose
  • Mouth
  • Food
  • Medication
  • Wound

Some germs survive on surfaces longer than others. Frequently touched objects can help germs move between people, especially when someone in the home is sick.

Through food

Foodborne germs can spread through:

  • Unwashed hands
  • Raw meat, poultry, seafood, or eggs
  • Contaminated cutting boards and utensils
  • Improper cooking
  • Food left at unsafe temperatures
  • Unwashed fruits and vegetables
  • Cross-contamination between raw and ready-to-eat foods

Through blood and other body fluids

Some infections can spread through:

  • Blood
  • Vomit
  • Stool
  • Urine
  • Saliva
  • Sexual contact
  • Shared needles
  • Contaminated personal-care items

Use gloves and careful cleaning when handling body fluids, and always wash your hands afterward.

Wash Your Hands at the Right Times

Handwashing is one of the most effective ways to reduce the spread of germs.

Wash your hands:

  • Before preparing food
  • Before eating
  • Before and after caring for someone who is sick
  • Before and after treating a cut or wound
  • Before taking or handling medication
  • After using the toilet
  • After changing a diaper
  • After helping someone use the bathroom
  • After handling vomit, stool, urine, blood, or another body fluid
  • After blowing your nose
  • After coughing or sneezing
  • After touching garbage
  • After touching animals, pet food, or animal waste
  • After handling raw meat, poultry, seafood, or eggs
  • After cleaning
  • After returning home from a crowded public place
  • Whenever your hands are visibly dirty

The CDC’s handwashing guidance identifies these everyday moments as important opportunities to prevent germs from spreading.

How to Wash Your Hands Correctly

Follow these five steps:

  1. Wet your hands with clean, running water.
  2. Apply soap.
  3. Rub your hands together to create a lather.
  4. Scrub for at least 20 seconds.
  5. Rinse and dry thoroughly.

Remember to scrub:

  • Palms
  • Backs of hands
  • Between fingers
  • Thumbs
  • Fingertips
  • Around and beneath nails
  • Wrists

Warm and cold water can both be effective. The important parts are using soap, scrubbing all surfaces, rinsing thoroughly, and drying your hands.

Dry with a clean towel, paper towel, or air dryer. Damp hands can transfer germs more easily than dry hands.

Regular soap is appropriate for everyday handwashing. Antibacterial soap is not usually necessary in the home unless a healthcare professional recommends it for a specific reason.

When to Use Hand Sanitizer

When soap and water are not available, use an alcohol-based hand sanitizer containing at least 60% alcohol.

To use it:

  1. Apply the amount listed on the product label.
  2. Rub it over every surface of both hands.
  3. Continue rubbing until the hands are completely dry.
  4. Do not wipe or rinse it away early.

Hand sanitizer is convenient, but it is not always a substitute for washing.

Use soap and water when hands are:

  • Visibly dirty
  • Greasy
  • Contaminated with chemicals
  • Soiled after bathroom use
  • Dirty after changing a diaper
  • Contaminated by vomit or diarrhea

Soap and water are more effective against certain germs, including norovirus, Cryptosporidium, and C. difficile. CDC hand-sanitizer guidance

Keep hand sanitizer away from flames and supervise young children. Swallowing alcohol-based sanitizer can cause poisoning. Do not make homemade sanitizer because an incorrect concentration may be ineffective or dangerous.

Cover Coughs and Sneezes

When coughing or sneezing:

  • Cover your mouth and nose with a tissue.
  • Throw the tissue in the trash immediately.
  • Wash or sanitize your hands.
  • If a tissue is unavailable, use the inside of your elbow.
  • Do not cough or sneeze directly into your hands.

If you cough into your hands, wash them before touching another person, food, shared objects, or your face.

The CDC recommends covering coughs and sneezes, discarding used tissues, and cleaning hands afterward to reduce the spread of respiratory illnesses. CDC coughing and sneezing guidance

Avoid Touching Your Face

Your eyes, nose, and mouth provide common entry points for germs.

Try not to touch your face with unwashed hands. This habit can be difficult to change because people often touch their faces without noticing.

Helpful reminders include:

  • Keep tissues nearby.
  • Wash hands before inserting contact lenses.
  • Clean eyeglasses regularly.
  • Avoid biting fingernails.
  • Keep hair away from the eyes and mouth.
  • Use a clean tissue rather than a bare finger when rubbing or wiping the nose.

Stay Home When You Are Sick

When possible, stay home and away from others if you have symptoms of a contagious illness.

Symptoms may include:

  • Fever
  • Chills
  • Cough
  • Sore throat
  • Runny nose
  • Vomiting
  • Diarrhea
  • Unexplained rash
  • Significant fatigue
  • Body aches

For respiratory illnesses, current CDC guidance generally recommends returning to normal activities after symptoms have been improving overall for at least 24 hours and any fever has been gone for at least 24 hours without fever-reducing medication. Additional precautions may still be appropriate for the next several days, especially around people at higher risk. CDC respiratory-virus recommendations

Instructions can differ for particular illnesses, workplaces, schools, healthcare settings, and local outbreaks. Follow guidance from your healthcare provider, employer, school, or public-health department.

Use Additional Precautions After an Illness

Even when someone begins feeling better, they may still be able to spread a respiratory virus.

For several days after returning to activities, consider:

  • Improving ventilation
  • Avoiding close contact with medically vulnerable people
  • Wearing a well-fitting mask in crowded indoor spaces
  • Keeping some distance from others
  • Testing when appropriate and available
  • Covering coughs and sneezes carefully
  • Cleaning hands frequently

Someone with a weakened immune system may remain contagious longer. Follow their healthcare provider’s instructions.

Improve Indoor Airflow

Some respiratory germs spread through particles that remain in indoor air.

To improve air quality:

  • Open windows or doors when weather and safety allow.
  • Use exhaust fans.
  • Run the heating or cooling system’s fan when appropriate.
  • Replace HVAC filters according to the system’s instructions.
  • Use a properly sized portable air cleaner with a HEPA filter.
  • Avoid blocking vents.
  • Gather outdoors when practical.
  • Reduce crowding in small, poorly ventilated rooms.

Do not create a safety risk by opening unsecured windows around young children or by operating equipment improperly.

Portable air cleaners work best when appropriately sized for the room and placed where airflow is not blocked. Follow the manufacturer’s maintenance and filter-replacement instructions.

Use Masks When They Add Protection

A well-fitting mask can reduce the spread of respiratory particles.

Masking may be particularly helpful when:

  • Someone in the home has a respiratory illness
  • You must be near a sick person
  • Respiratory illnesses are increasing in the community
  • You recently recovered and are returning to activities
  • You will be in a crowded indoor space
  • You are visiting someone at high risk for severe illness
  • A healthcare professional recommends it

A mask should fit closely around the nose, mouth, and chin without large gaps.

Replace disposable masks when they become wet, dirty, or damaged. Wash reusable masks according to their instructions.

Masks are one prevention tool. They work best alongside vaccination, cleaner air, hand hygiene, staying home when sick, and appropriate testing or treatment.

Keep Vaccinations Current

Vaccination can lower the risk of becoming seriously ill from certain infections and may reduce complications and hospitalization.

Vaccines may be recommended based on:

  • Age
  • Pregnancy
  • Health conditions
  • Employment
  • Travel
  • Living arrangements
  • Previous vaccination history
  • Seasonal illness patterns

Ask a healthcare professional which vaccines are appropriate. These may include vaccines against influenza, COVID-19, RSV, pneumonia, shingles, tetanus, whooping cough, hepatitis, or other illnesses.

Vaccination recommendations change over time, so review your records periodically rather than assuming that childhood vaccines cover every current need.

Cleaning, Sanitizing, and Disinfecting Are Different

These terms do not mean the same thing.

Cleaning

Cleaning uses soap or detergent, water, and physical scrubbing to remove dirt and many germs from a surface.

Sanitizing

Sanitizing reduces the number of germs to a level considered safer, often on food-contact surfaces or certain children’s items.

Disinfecting

Disinfecting uses a chemical product to kill many germs remaining on a surface.

In most homes, routine cleaning with soap or detergent is usually enough when no one is sick. Disinfection becomes more important when someone is ill, has recently been ill, or is at higher risk of severe infection. CDC cleaning and disinfecting guidance

Clean Frequently Touched Surfaces

High-touch surfaces may include:

  • Doorknobs
  • Light switches
  • Faucet handles
  • Toilet handles
  • Countertops
  • Refrigerator handles
  • Cabinet pulls
  • Stair railings
  • Remote controls
  • Phones
  • Tablets
  • Keyboards
  • Mobility aids
  • Shared toys
  • Appliance controls

Clean these areas regularly and more frequently when someone is sick.

Follow device manufacturers’ instructions before applying liquid cleaners to electronics. Some products can damage screens or protective coatings.

Helpful Resources: Browse Cleaning & Disinfecting for products, equipment, services, or supplies related to this section.

Use Cleaning Products Safely

Always read the product label.

Important precautions include:

  • Use the product only on approved surfaces.
  • Wear gloves or eye protection when instructed.
  • Provide ventilation.
  • Keep children and pets away during use.
  • Allow the product to remain wet for the required contact time.
  • Store products in their original containers.
  • Keep products away from food.
  • Wash hands after removing gloves.
  • Never transfer chemicals into food or drink containers.

Never mix bleach with:

  • Ammonia
  • Vinegar
  • Toilet-bowl cleaner
  • Acids
  • Alcohol
  • Other cleaners or disinfectants

Mixing cleaning chemicals can create dangerous gases.

The CDC advises cleaning visibly dirty surfaces before disinfecting and following every label instruction, including ventilation, protective equipment, dilution, and contact time. CDC bleach safety guidance

Do Not Overuse Disinfectants

More disinfectant does not provide better protection.

Overuse can:

  • Irritate skin and lungs
  • Trigger asthma symptoms
  • Damage surfaces
  • Poison children or pets
  • Create dangerous fumes
  • Waste money

Do not spray disinfectants into the air or onto people. Do not use surface disinfectants on skin.

Focus on appropriate cleaning, correct products, high-touch surfaces, and situations where illness is present.

When Someone at Home Is Sick

When practical, the sick person should:

  • Rest in a separate room
  • Use a separate bathroom
  • Avoid preparing food for others
  • Use their own towels and personal items
  • Keep tissues and a lined trash container nearby
  • Improve airflow in their room
  • Limit close contact with vulnerable household members

If separation is not possible:

  • Increase distance where practical.
  • Improve ventilation.
  • Consider well-fitting masks.
  • Clean shared high-touch surfaces.
  • Wash hands after providing care.
  • Avoid sharing cups, utensils, towels, bedding, phones, or personal-care items.

Do not isolate someone so completely that they cannot obtain food, fluids, medication, or medical help.

Caring for Someone With Vomiting or Diarrhea

Vomiting and diarrhea can spread germs quickly.

When providing care:

  • Wear disposable gloves when cleaning body fluids.
  • Wash hands with soap and water after removing gloves.
  • Clean and disinfect contaminated surfaces promptly.
  • Wash contaminated clothing and linens.
  • Keep the sick person away from food preparation.
  • Do not share towels.
  • Close the toilet lid before flushing when a lid is available.
  • Clean toilet seats, flush handles, faucets, and doorknobs.

Hand sanitizer may be less effective against norovirus and certain other diarrhea-causing germs. Use soap and water.

If vomiting occurs on a surface:

  1. Keep other people and pets away.
  2. Wear gloves.
  3. Remove visible material with disposable towels.
  4. Place the waste in a closed bag.
  5. Clean the area.
  6. Disinfect it with a product labeled for the suspected germ or follow public-health instructions.
  7. Wash your hands thoroughly.

Never mix cleaning chemicals.

Handle Laundry Safely

Ordinary laundry can usually be washed using detergent and the warmest appropriate water setting listed on the fabric label.

When laundry is contaminated with body fluids:

  • Wear gloves if available.
  • Avoid shaking the items.
  • Keep contaminated laundry away from your clothing.
  • Place it directly into the washer or a washable container.
  • Use detergent.
  • Dry items completely.
  • Clean the hamper if contaminated.
  • Wash your hands afterward.

A sick person’s laundry can often be washed with other household laundry unless a healthcare professional gives different instructions.

For certain illnesses, such as C. difficile, special cleaning and laundry precautions may be needed. Follow the healthcare team’s directions.

Practice Safe Bathroom Hygiene

Bathrooms contain many high-touch surfaces and may become contaminated by stool, urine, vomit, or respiratory secretions.

Helpful habits include:

  • Wash hands after every toilet use.
  • Clean visible soil promptly.
  • Clean toilet seats and handles regularly.
  • Do not share toothbrushes.
  • Store toothbrushes so they do not touch.
  • Replace toothbrushes if a healthcare professional recommends it after an illness.
  • Keep towels from remaining damp for long periods.
  • Give each person a separate towel when someone is sick.
  • Clean faucets and doorknobs.
  • Keep medication and personal-care products protected from contamination.

Do not place medication directly on bathroom counters.

Prevent Germs From Spreading Through Food

Before preparing food:

  • Wash your hands.
  • Clean counters and utensils.
  • Keep raw ingredients separate from ready-to-eat food.
  • Wash fruits and vegetables under running water.
  • Check expiration and storage information.

During preparation:

  • Use separate cutting boards for raw meat and ready-to-eat foods when possible.
  • Do not wash raw poultry, because splashing can spread germs.
  • Cook food to a safe internal temperature.
  • Use a food thermometer.
  • Replace or wash utensils that touched raw food.
  • Do not taste food with a utensil and then return it to the dish.

After eating:

  • Refrigerate perishable food promptly.
  • Wash dishes thoroughly.
  • Clean food-contact surfaces.
  • Replace heavily worn cutting boards that are difficult to clean.

Someone with vomiting or diarrhea should not prepare food for others. Follow professional guidance about how long to wait after symptoms stop.

Do Not Share Personal Items

Avoid sharing items that may carry saliva, blood, skin cells, or other body fluids, including:

  • Toothbrushes
  • Razors
  • Towels
  • Washcloths
  • Nail clippers
  • Makeup
  • Lip products
  • Contact-lens supplies
  • Drinking cups
  • Eating utensils
  • Inhalers
  • Needles
  • Glucose-testing equipment

Clean shared exercise equipment, mobility devices, and frequently handled objects.

Medication should only be used by the person for whom it was prescribed.

Care for Cuts and Wounds

Broken skin provides an entry point for germs.

When caring for a wound:

  • Wash your hands before and after.
  • Wear gloves when treating someone else.
  • Rinse and clean the wound appropriately.
  • Keep it covered with a clean dressing.
  • Change the dressing when wet, dirty, or directed.
  • Do not share ointment containers directly between wounds.
  • Dispose of used dressings safely.
  • Watch for infection.

Seek medical care for spreading redness, increasing warmth, worsening pain, pus, fever, red streaks, deep wounds, or injuries caused by bites or dirty objects.

Handle Pets Safely

Animals can carry germs even when they appear healthy.

Wash your hands after:

  • Touching animal waste
  • Cleaning cages, tanks, or litter boxes
  • Handling pet food or treats
  • Touching reptiles, amphibians, poultry, or farm animals
  • Cleaning an aquarium
  • Caring for a sick animal

Keep pet food and feeding supplies separate from human food-preparation areas. Do not clean animal tanks or cages in the kitchen sink when another suitable location is available.

Ask a veterinarian about regular care, vaccines, parasite prevention, and signs of illness.

People who are pregnant or have weakened immune systems may need special precautions around litter boxes, reptiles, poultry, and certain animals.

Germ Prevention Around Babies and Vulnerable People

Some people are more likely to develop serious complications from infection, including:

  • Babies
  • Older adults
  • Pregnant people
  • People receiving cancer treatment
  • Organ-transplant recipients
  • People taking immune-suppressing medication
  • People with certain chronic illnesses
  • People with weakened immune systems

When visiting someone at higher risk:

  • Stay home if you are sick.
  • Wash your hands upon arrival.
  • Ask before holding or kissing a baby.
  • Follow masking requests.
  • Avoid bringing children with active symptoms.
  • Do not prepare food if you have vomiting or diarrhea.
  • Follow any precautions provided by the person’s healthcare team.

These precautions are about protecting health, not rejecting visitors.

Germ Prevention at Work, School, and in Public

Carry a few basic supplies:

  • Tissues
  • Hand sanitizer
  • A spare mask
  • Personal medication
  • Disinfecting wipes when appropriate

In shared spaces:

  • Clean hands before eating.
  • Avoid touching your face.
  • Cover coughs and sneezes.
  • Do not share drinks or utensils.
  • Clean shared equipment when required.
  • Stay home when workplace or school illness rules direct you to.
  • Improve airflow when possible.
  • Avoid close contact with people who are visibly ill.

Do not rely on gloves as a substitute for hand hygiene. Gloves become contaminated just as hands do, and hands should be cleaned after gloves are removed.

Know When to Contact a Healthcare Professional

Contact a healthcare professional when someone has:

  • Trouble breathing
  • Chest pain
  • Confusion
  • Blue, gray, or pale lips
  • Severe weakness
  • Signs of dehydration
  • Persistent or worsening fever
  • Repeated vomiting
  • Bloody diarrhea
  • Severe abdominal pain
  • A stiff neck with fever
  • A rapidly spreading rash
  • Symptoms that improve and then become worse
  • A high risk of complications
  • An illness for which early treatment may be available

Call 911 for serious breathing difficulty, unconsciousness, severe confusion, a seizure, or another life-threatening emergency.

People at higher risk should contact a healthcare professional early when respiratory symptoms begin. Treatments for illnesses such as influenza and COVID-19 may work best when started promptly.

Common Mistakes to Avoid

When trying to prevent illness:

  • Do not wash only the palms of your hands.
  • Do not rely on sanitizer when hands are visibly dirty.
  • Do not wipe sanitizer off before it dries.
  • Do not cough or sneeze into bare hands.
  • Do not share towels, razors, toothbrushes, or medication.
  • Do not mix cleaning products.
  • Do not use surface disinfectant on skin.
  • Do not assume more chemical means better cleaning.
  • Do not prepare food for others while vomiting or experiencing diarrhea.
  • Do not leave cooked food at room temperature for long periods.
  • Do not hide symptoms to attend work, school, or gatherings.
  • Do not expect antibiotics to treat viral illnesses.
  • Do not stop prescribed medication without professional guidance.
  • Do not shame someone for becoming sick.

A Simple Germ-Prevention Checklist

To reduce the spread of illness:

  1. Wash your hands with soap and water for at least 20 seconds.
  2. Use sanitizer with at least 60% alcohol when washing is unavailable.
  3. Cover coughs and sneezes with a tissue or your elbow.
  4. Avoid touching your face with unwashed hands.
  5. Stay home when you are sick.
  6. Improve indoor airflow.
  7. Clean high-touch surfaces regularly.
  8. Disinfect appropriately when someone is sick.
  9. Handle food and body fluids carefully.
  10. Avoid sharing personal items.
  11. Keep recommended vaccinations current.
  12. Take extra precautions around people at higher risk.

You do not need to complete every precaution perfectly to make a difference. Consistent everyday habits can substantially reduce how easily germs move through a household.

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Important Health & Safety Notice

The information in this guide is provided for general educational purposes only. Independence Answers is not a medical provider, and this content is not a substitute for professional medical advice, diagnosis, treatment, or supervision. Always follow the instructions of your doctor, pharmacist, or other qualified healthcare professional, especially if you have a medical condition, take medication, or are unsure whether an action is safe for you.

Do not ignore or delay seeking professional care because of something you read here. If you believe someone may be experiencing a serious or life-threatening emergency, call 911 or your local emergency number immediately.