What is the influenza A vaccine?

Influenza A is an acute respiratory infectious disease caused by the influenza A virus, characterized by high contagiousness and epidemic potential. The influenza A vaccine, officially known as the influenza A (H1N1) vaccine, is specifically designed to prevent infection by the influenza A (H1N1) virus. Vaccination with the influenza A vaccine is one of the most effective methods for preventing influenza A, capable of reducing both the risk of infection and the severity of illness.

However, the influenza A vaccine may also cause side effects. Common side effects include pain and redness at the injection site, fever, headache, muscle aches, and fatigue. These reactions are usually mild and temporary, resolving within 1–2 days without causing long-term health effects. In very rare cases, severe allergic reactions may occur, such as difficulty breathing, swelling of the face or throat, and rapid heartbeat, although the incidence of such events is extremely low.

It is recommended to have a detailed discussion with a physician before vaccination to determine whether your personal health condition is suitable for receiving the influenza A vaccine. The physician will assess the risks and benefits of vaccination based on your medical history, allergy history, and current health status. Additionally, after vaccination, close attention should be paid to bodily reactions, and if serious discomfort occurs, prompt medical attention should be sought. At the same time, maintaining good personal hygiene habits, such as frequent hand washing, wearing masks, and avoiding contact with infected individuals, can also help prevent influenza A.