Health risks of seasonal infections and cold weather

Medical professionals and specialists are warning of the significant health complications associated with seasonal infections and cold weather. Experts note that while acute influenza symptoms typically resolve within days, patients may face lingering respiratory issues or secondary infections.

There is a particular emphasis on the cardiovascular risks posed by these illnesses. Influenza, pneumonia, and COVID-19 can trigger systemic inflammation, which may increase blood clotting tendencies or cause arterial plaques to rupture. Research suggests that the risk of myocardial infarction and stroke can increase significantly following a flu infection. For individuals with underlying conditions such as diabetes or chronic lung disease, these infections can lead to severe complications, including heart failure, as fever and infection increase heart rate and oxygen demand.

Additionally, cardiologists have noted that cold temperatures cause blood vessels to constrict to maintain core body temperature, which raises blood pressure and increases the workload on the heart. This physiological response can trigger heart attacks, especially in individuals with existing vascular narrowing or heart disease.

Recent medical discussions have expanded on these risks, noting that autoimmune or immunomodulatory rheumatic diseases, such as arthritis, present an added cardiovascular risk requiring heightened clinical attention. Experts at a scientific session in Spain have argued that influenza vaccination should move from a simple recommendation to an active medical indication. A meta-analysis suggests that influenza vaccination is associated with a 34% reduction in major cardiovascular events, particularly in patients who have recently experienced acute coronary syndrome.