The third dose of the vaccine does not mean that you are not afraid of the virus, but that there is some resistance to the virus, but there is still a risk of infection and you need to take care of protection. Vaccine is a biological product made from various types of pathogenic microorganisms for preventive inoculation. After vaccination, antibodies can be produced accordingly, so that the body is in a state of protection, but the level of resistance varies from person to person, and it is not foolproof to complete the vaccination, but still need to be actively protected. In addition, the production of some antibodies is not lifelong, and may only play a protective role for a period of time, such as hepatitis B antibodies. For example, hepatitis B antibodies may only protect for a short period of time, and if certain viruses mutate, the corresponding vaccine may also change. Take the new coronavirus pneumonia vaccine as an example, even if you have already received the third dose of the vaccine, you can’t take it lightly, you still need to wear a mask when you go in and out of public places, wash your hands regularly, ventilate your home, and avoid going to high-risk areas and places with a high concentration of people. [Tip] The “new coronavirus pneumonia” mentioned in this article has been renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.