Influensasäsong

Influensasäsong refers to the period of the year when influenza, commonly known as the flu, circulates most actively in a community. This seasonal pattern is observed in temperate climates, with influenza activity typically peaking during the colder months. While the exact timing and intensity can vary from year to year, the winter season in the Northern Hemisphere usually sees an increase in flu cases from late autumn through early spring, with the peak often occurring between December and February. Similarly, the Southern Hemisphere experiences its influensasäsong during its winter months.

The increase in influensasäsong is thought to be influenced by a combination of factors. Cooler temperatures may allow the influenza virus to survive longer in the environment, and people tend to spend more time indoors in closer proximity to others, facilitating transmission. Respiratory droplets expelled through coughing or sneezing are the primary mode of spread.

Symptoms of influenza include fever, cough, sore throat, muscle aches, headache, and fatigue. While most healthy individuals recover within a week or two, influenza can lead to serious complications, particularly for young children, older adults, pregnant women, and individuals with chronic health conditions. Vaccination is the most effective way to prevent influenza and its complications. Public health organizations recommend annual flu shots to protect against the circulating strains of the virus.