How to Strengthen Your Immunity And Prevent Recurring Illness During Winter

In the winter, the viruses that cause colds and influenza spread rapidly, weakening the immune system and increasing the risk of infection. It particularly occurs due to the rapid fluctuations in the weather, as the weather may be pleasant and stable in the morning, and change significantly by the evening.

In this article, you will learn about the effects of winter on immunity, the most important strategies that can help support immunity, and the best foods and drinks that can help boost immunity and prevent recurring illness.

What Makes Viruses Spread Faster in Winter?

The respiratory infections spread may increase in the winter due to:

The virus’s ability to stay longer in the cold and dry closed spaces.
Spending a long time indoors when the weather turns colder increases contact between individuals and the possibility of infection spread.
Traveling to colder countries during winter may spread infections, particularly if the country has endemic diseases.

According to the Centers for Disease Control and Prevention (CDC), the rate of respiratory infections has been rising each year. Every year, one million individuals are hospitalized in the United States because of respiratory infections, and more than 70,000 deaths are caused by these infections each year.

The viruses causing cold spread easily through the droplets from coughing or sneezing. They may also spread through contact with infected surfaces such as door handles or keys.

According to a study published in 2022, the cold weather weakens the immunity of the nose, making the upper respiratory tract more susceptible to infections.

How Your Body Defends Itself?

The immune system is the first line of defense against bacteria and viruses in the body. It involves two main parts:

Innate Immunity

The innate immunity consists of various immune cells and physical barriers such as the skin and mucous membranes. It is considered the first line of defense against any potential threat or infection.

Acquired (Adaptive) Immunity

When the innate immunity fails to fight infections, the acquired immunity activates. It can target the pathogens with more precision and effectiveness. It involves T cells, B cells, and the antibodies produced by the body after the first exposure to the infection.

The initial response of the acquired immunity is relatively slow. However, when the body faces the same infection again, it becomes much faster because it can remember the pathogens it has previously been exposed to.

Therefore, some diseases may occur only once during a person’s lifetime or may occur with milder symptoms.

Why Does Immunity Weaken in Winter?

Several environmental and lifestyle factors can greatly influence the immune system during winter. They include:

Decreased vitamin D levels: This occurs due to shorter daylight hours in winter and spending more time indoors. As a result, exposure to sunlight decreases, which may lower vitamin D levels needed to support the immune system.
Cold and dry weather: This helps viruses to remain longer in the air. Cold weather also weakens the nasal mucous membranes, allowing viruses to get inside the body easily.
Close contact: People spend a long time indoors in cold weather, which increases contact between people and leads to the spread.
Lifestyle changes: Changes in eating habits, reduced exercise, and sleeping patterns may also affect the immune system.

Warning Signs of Low Immunity

Various signs may indicate that the immune system is weakened, such as:

Frequent colds and infections.
Slow recovery.
Fatigue and exhaustion.
Recurring sore throat.
Digestive problems.

Common Winter Illnesses

Many diseases may affect people during winter, such as:

Common Cold

Cold symptoms are usually mild, but a cold is highly infectious and can spread easily. Symptoms may include:

Runny nose.
Postnasal drip.
Coughing.
Slight rise in body temperature.

Influenza

Influenza symptoms are often more severe than cold symptoms. They may include a high fever, severe body aches, and headaches.

Other Respiratory Illnesses

Winter illnesses are not limited to the common cold and influenza. They may also include other respiratory conditions such as:

Sore throat.
Bronchitis.
Seasonal allergies.

Children are generally more susceptible to winter illnesses because their immune systems are still developing. Also, frequent contact with others in schools and daycare areas increases the risk of infection.

In some cases, respiratory illnesses may develop into pneumonia, causing these symptoms:

Severe coughing, accompanied by mucus.
Chest pain.
Shortness of breath.

How Can You Strengthen Immunity in Winter?

There is no magic solution to strengthen your immunity. However, it needs to try some healthy practices consistently for better results.

Balanced and Healthy Nutrition

Several foods can support the immune system during the winter, such as:

Fruits, vegetables, whole grain products, healthy proteins, nuts, seeds, and legumes: Rich in vitamins, minerals, and other essential nutrients. They also have abundant antioxidants that prevent cell damage and reduce inflammation.
Citrus fruits like berries, broccoli, and leafy greens: Rich in vitamin C, which supports the white blood cells’ functions.
Healthy fats: Healthy fats reduce inflammatory responses and boost immunity. They include olive oil, fish, nuts, and seeds.
Fermented Foods: They contain probiotics, which improve immunity. They include yoghurt, kefir, and sauerkraut.

Regular Physical Activity

It improves the blood circulation and the movement of immune cells through the body. Experts recommend moderate exercise for at least 150 minutes weekly, like brisk walking and cycling.

Weight Management

Obesity can greatly affect the immune system and may even reduce the efficiency of vaccines. Therefore, it is important to maintain a healthy weight.

Sleep improvement

The sleep quality largely affects the immune system. According to research, sleeping for less than six hours per night may lead to a cold. It is recommended for adults to get at least seven hours of sleep every night.

Hydration

Drinking water can maintain the moisture of mucous membranes, support the body’s functions, and enhance immunity. Therefore, it is important to drink enough water every day.

Stress Management

Chronic stress has a significant impact on the immune system. It can increase inflammation. Stress and anxiety can be controlled by regular physical activity, breathing exercises, and meditation.

Smoking and Excessive Alcohol Cessation

Smoking can damage the human respiratory system and impair the immune system. Alcohol consumption also affects immune cells’ functions.

Conclusion

Environmental changes and lifestyle habits have a significant impact on the spread of respiratory infections in winter. You can decrease the risk of infection and support immunity by maintaining healthy sleep, eating nutritious, healthy foods, exercising regularly, and managing stress.

To strengthen your immunity and stay healthy, get a personalized nutrition and lifestyle plan for winter using the iDoc app.