It is usually recommended that the interval between the first and second doses of the new crown vaccine be 3 weeks or more, i.e., the second dose should be given 21 days after the first dose and thereafter, with the 21 days counting from the day of vaccination. For example, if the vaccination date for the recipient is September 1, then September 1 is the first day, and the second vaccination can be given from and including September 21, and the vaccination should be completed before the 56th day. However, the calculation of the vaccination time may vary from region to region or from vaccination site to vaccination site, so it is recommended to ask the local vaccination officer. Vaccination on less than 21 days or more than 56 days may affect the effect of antibody production in the body, but the purpose of immunization can generally be achieved, so there is no need to worry too much. If a second dose of New Crown vaccine is administered less than 21 days later, the incidence of adverse reactions may increase, so early vaccination is not recommended. If it has been more than 56 days since the second dose was administered, there is no need to revaccinate, but only to give a supplementary dose as soon as possible. After the completion of the first dose of the new crown vaccine, it is normal to have minor symptoms of discomfort and there is no need to stop the vaccination. If a woman finds that she is pregnant after the first vaccination, it is recommended that she stop the second vaccination and do a good job of pregnancy tests later on, so there is usually no need to stop the pregnancy. In addition, after all vaccinations are completed, you should still take personal protective measures, wear a mask when you go out, avoid going to places where people gather as much as possible, and do regular disinfection and ventilation work.