流感高发，请收好这份防护指南

Core Viewpoint - The current flu season in China is experiencing a high prevalence, with a positive detection rate of 54.2% for flu viruses in outpatient and emergency departments from December 1 to 7, indicating an upward trend in flu virus detection, although the rate of increase is slowing down [1] Group 1: Flu Characteristics and Treatment - Flu symptoms are more severe than those of a common cold, including sudden high fever (over 39 degrees Celsius), chills, headaches, muscle aches, and fatigue, which can lead to serious complications in vulnerable populations such as the elderly and those with underlying health conditions [2] - Flu is generally self-limiting, with mild cases recovering at home through rest and proper nutrition; however, severe cases may require antiviral treatment and management of complications [2][3] Group 2: Vaccination Recommendations - Vaccination is the most effective and economical means of preventing infectious diseases; individuals, especially children, the elderly, and those with underlying conditions, are encouraged to get vaccinated as flu activity increases [4] - Vaccination guidelines specify that children aged 6 months to 8 years require two doses of inactivated vaccine for their first vaccination, while those aged 9 and above need only one dose annually, regardless of previous vaccinations [5] Group 3: Post-Recovery Guidelines - After recovering from flu, individuals should maintain good hygiene practices, such as wearing masks, frequent handwashing, and ensuring proper ventilation to prevent reinfection [6][7] - Vulnerable groups should take extra precautions in crowded places, and schools should monitor health conditions to prevent the spread of illness [7]