It is not necessary to revaccinate with the new crown vaccine after one year, but you may consider whether to receive a booster dose of the new crown vaccine. Since vaccination requirements are not entirely consistent from region to region, it is recommended that you first consult with your local CDC. The New Coronavirus booster can be given 6 months after completing the full New Coronavirus vaccination, not as a revaccination of the New Coronavirus vaccine, but as a booster dose of the same type of vaccine as the previous one. Priority vaccination is recommended for people in areas at high risk of New Coronavirus transmission, as well as for people in social security critical positions. Studies have shown that the current timeliness of the New Coronavirus vaccine is around 6 months, after which antibody levels gradually decline, but antibodies are not the only indicator of protection, and the individual health condition of the vaccine recipient has an impact on maintaining the efficacy of the New Coronavirus vaccine. After the level of immune protection decreases, it is necessary to receive another booster dose of the vaccine to improve the durability of the vaccine. Moreover, the New Coronavirus is in a state of constant mutation, and Delta virus has been found to be more infectious and virulent, and the New Coronavirus booster vaccination can stabilize the prevention of Delta virus, so it is recommended to actively receive the New Coronavirus booster vaccination. In addition, vaccination with the New Coronavirus vaccine does not completely prevent the vaccinated person from getting the New Coronavirus. It is recommended that the vaccinated person take daily precautions, wear a mask when going out, minimize going to places where people gather, wash hands regularly, ventilate frequently, and keep the air at home fluid, etc., all of which can effectively prevent infection with the New Coronavirus.