At the beginning of 2020, the new crown virus broke out in China, and the epidemic was quickly brought under control after joint efforts, but the epidemic is not over, and disseminated cases occur from time to time, especially in the recent Hebei Province, where the epidemic is increasing, and the current method that can effectively control the new crown epidemic is vaccination against the new crown. China’s new crown vaccine is at the forefront of the world in terms of both effectiveness and safety. The current strategy for vaccination against the new crown in China is to vaccinate in steps, with the first vaccination being for key populations engaged in port quarantine, aviation departments, imported cold chains, medical personnel, etc. Then, as vaccine production rises, most ordinary people can be vaccinated, and China is the first country to propose free vaccination against the new crown for all, which is very proud of the country. How many doses do we need? In order to receive the NCC vaccine, we need to do it in an orderly manner under the coordination of the local health committee. As recommended by the CDC, it is recommended to receive 2 doses of NCC vaccine with an interval of 14 days between each dose, because it takes 1 month to produce effective antibodies after receiving the NCC vaccine, and not everyone can produce antibodies after receiving the vaccine. Therefore, it is still necessary to wear a mask, wash your hands frequently, ventilate more often, and minimize going to crowded places. Of course, not everyone is suitable for vaccination, and those who have a history of drug allergy, poor body resistance, or have recently received other vaccines should be vaccinated with caution to avoid complications.