There is no specific notification about the timing of the fourth dose of the Neocoronavirus vaccine, so it is not yet clear if and when the fourth Neocoronavirus vaccine dose is required. At present, there are three main types of vaccines, namely, inactivated vaccine, recombinant protein subunit vaccine and adenovirus carrier vaccine, and only the first two require three doses, while the third requires only one dose. At present, the immunization schedule for the new coronavirus vaccine is not clear, and there has not yet been any official notification of the need for a fourth dose of the new coronavirus vaccine, so the exact timing is not clear. It is advisable to wait for official notification of when the fourth dose of the vaccine will be given, wear a mask, wash your hands frequently, and avoid going to places where people gather to minimize the risk of being infected. [Tip] In this article, “new coronary pneumonia, new coronary virus pneumonia” has been renamed to “new coronary virus infection” on December 26, 2022, as announced by the National Health Commission.