Seasonal Influenza is a contagious respiratory illness caused by influenza viruses. It typically occurs in the fall and winter months, leading to outbreaks in communities. Symptoms often include fever, cough, sore throat, body aches, and fatigue. Most people recover within a week, but some may develop serious complications. Vaccination is the most effective way to prevent seasonal influenza. The flu vaccine is updated annually to match circulating virus strains. Public health measures, such as handwashing and staying home when sick, can also help reduce the spread of the virus during flu season.