How many shots are needed for the flu vaccine?

Generally, children need to receive two doses of the influenza vaccine, while adults require only one dose. If necessary, it is recommended to consult a doctor for advice. The detailed explanation is as follows:

Children's immune systems are relatively weak and still developing, making them less resistant to viruses compared to adults; therefore, two doses are required. Receiving two doses of the influenza vaccine can more effectively stimulate children's immune systems to produce antibodies, thereby enhancing their resistance to the influenza virus and reducing the risk of infection. Furthermore, children are important transmitters of the influenza virus, as it spreads easily among them in group settings such as schools and daycare centers. Receiving two vaccine doses also helps reduce the spread of the virus among children.

Adults have relatively mature immune systems that respond more quickly and effectively to vaccines. One dose is sufficient to stimulate the adult immune system to produce adequate antibodies to fight the influenza virus. Adults are often socially active and can easily become transmitters of the influenza virus. Vaccination not only protects themselves but also helps reduce the spread of the virus to some extent, protecting family members, friends, and colleagues.

After receiving the influenza vaccine, the injection site should be kept dry, and bathing should be avoided for 24 hours to prevent infection.