Rainy season health tips: How to prevent flu at home
By Faith Lagat, October 6, 2025As the rainy season settles in, the cool, damp weather increases the spread of influenza viruses, making prevention at home essential.
Fluctuating temperatures and high humidity create an environment where flu viruses thrive, particularly in households with children or elderly members.
Experts emphasise adopting practical, evidence-based habits to maintain wellness and reduce the risk of illness during this period.
Boost immunity and maintain clean spaces
A strong immune system is a key defence against the flu. Diets rich in fruits and vegetables, especially those high in vitamin C like oranges, bell peppers, and strawberries, can enhance immune function. Zinc-rich foods such as nuts, seeds, and lean meats also support antiviral defenses.
Warm soups containing garlic and ginger, known for their antimicrobial properties, offer both comfort and protection, while staying hydrated with water or herbal teas helps maintain mucosal barriers that block pathogens.
Maintaining a clean home is equally important. Flu viruses can survive on surfaces for up to 48 hours, making regular disinfection of doorknobs, light switches, and countertops necessary. Bedding and towels should be washed frequently in hot water to eliminate germs.
According to the World Health Organization, it recommends at least 30 minutes of moderate exercise most days to enhance immune response.
“WHO recommends that all healthy adults do 30 mins/day of physical activity, and children should be physically active for 1 hour/day.”
Damp indoor conditions can foster mold, which may weaken respiratory health. Using a dehumidifier or ensuring proper ventilation to keep humidity below 50 per cent, as well as opening windows when possible, reduces the concentration of airborne viruses.
Hygiene, sleep, and indoor activity
Handwashing remains a cornerstone of flu prevention. Individuals should scrub their hands with soap for at least 20 seconds, particularly after being outdoors or touching shared surfaces. Alcohol-based hand sanitisers with at least 60 per cent alcohol can be used if soap is unavailable. Avoiding face-touching and covering coughs or sneezes with a tissue or elbow can help prevent the spread of germs.
Sleep and stress management also influence immune health. Adults generally need 7–9 hours of sleep nightly, with children requiring more. Lack of rest reduces the body’s ability to fight infections. Rainy days can increase stress levels, which may weaken immunity. Incorporating relaxation techniques such as meditation or yoga, along with calming indoor activities like reading or listening to music, can support wellness.
Staying active indoors is recommended as exercise improves circulation and reduces stress hormones. Home workouts, stretching, or online fitness classes can maintain physical activity when outdoor options are limited.
Vaccinations remain a key preventive measure. The annual flu vaccine reduces severe outcomes by up to 60 per cent , according to the Centres for Disease Control and Prevention (CDC).
While natural remedies such as elderberry or echinacea are popular, their effectiveness is mixed, and consulting a healthcare provider is advised.
By following these practices, households can reduce the risk of flu and maintain comfort throughout the rainy season.