If you’ve been dealing with constant coughs, sneezing, fatigue, or unexplained allergies lately, you’re not alone. Seasonal transitions are one of the most common triggers for falling sick but what many
don’t realise is that these changes can quietly weaken your immune system. And for some people, the risk is much higher than it seems.
“During seasonal transitions, the body is constantly trying to adapt to changes in temperature, humidity, and air quality,” says Dr Ajay Kumar Gupta, Senior Director & Head – Internal Medicine, Max Super Speciality Hospital, Vaishali. “This adjustment can temporarily weaken the immune response, making individuals more vulnerable to infections and allergies.”
From a medical perspective, these environmental fluctuations can disrupt the body’s natural balance. Sudden exposure to varying conditions, such as heat, cold, pollution, or allergens can make it easier for viruses and irritants to affect the respiratory system.
“The immune system may become slightly compromised during this time, which is why people experience more frequent coughing, sneezing, and allergic reactions,” explains Dr Gupta.
Who Is Most at Risk?
Certain groups are particularly vulnerable during seasonal changes.
“Children and older adults are at higher risk because their immune systems are either still developing or have weakened over time,” says Dr Gupta. “This makes it harder for them to fight off infections effectively.”
Individuals with chronic health conditions also need to be cautious.
“People with conditions such as type 2 diabetes, asthma, cardiovascular disease, or chronic kidney disease often have a reduced immune response, making them more prone to infections and slower recovery,” he adds.
Those sensitive to allergens or prone to respiratory irritation may also experience worsening symptoms during this period, especially when pollen counts and pollution levels rise.
“When the immune system is compromised, the body becomes more reactive to allergens and more susceptible to viral infections,” notes Dr Gupta.
Lifestyle Factors That Weaken Immunity
Daily habits also play a crucial role in determining how well the body copes with seasonal changes.
“Lack of sleep, high stress levels, and irregular eating habits can significantly weaken immunity,” says Dr Gupta. “Elevated stress hormones like cortisol suppress immune function, while poor sleep affects the body’s ability to repair and defend itself.”
Nutritional deficiencies can further increase vulnerability. “Inadequate intake of essential vitamins, especially Vitamin D and Vitamin C, can make individuals more prone to falling sick,” he explains.
Environmental Exposure Risks
Frequent shifts between different environments can also impact health. “Moving between air-conditioned indoor spaces and hot, polluted outdoor environments puts additional stress on the respiratory system,” says Dr Gupta. “This repeated exposure can weaken the body’s natural defence mechanisms over time.”
Preventive Measures to Stay Healthy
Experts emphasise that preventive care is key during seasonal transitions.
“Maintaining a consistent sleep routine, staying well-hydrated, and consuming a balanced diet rich in fruits, vegetables, and proteins are essential for strengthening immunity,” advises Dr Gupta.
Regular physical activity and exposure to natural sunlight can further support immune health.
“Incorporating daily exercise and spending time outdoors can help boost overall immunity,” he adds.
Basic hygiene practices also remain crucial. “Frequent handwashing, avoiding crowded places during outbreaks, and seeking medical attention if symptoms persist for more than a few days are important steps,” says Dr Gupta.
Seasonal illnesses are common, but they are not inevitable. “By identifying those at higher risk and adopting proactive preventive measures, we can reduce infections and ensure a smoother transition between seasons,” concludes Dr Gupta.
