The validity of the third dose of the new coronavirus vaccine may last for about six months or even longer, and the details are still under clinical observation. In order to prevent the new coronavirus infection, it is recommended to receive a booster shot of the new coronavirus vaccine. Antibodies are generally effective for about six months after the first vaccination and can slowly decrease over time, so it is recommended that a booster injection be given in a timely manner in accordance with national policy. After the third injection of the new crown vaccine, the effective prevention period may be more than half a year. The new crown vaccine booster can stimulate the body to produce more antibodies to prevent viral infections. The New Crown vaccine is a new vaccine introduced in recent years, and its clinical efficacy is under further observation and research, and a new vaccination program may be introduced at a later stage.