On March 21, at a press conference held by the Joint Prevention and Control Mechanism of the State Council, Wang Huaqing, chief expert of the China Centers for Disease Control and Prevention's immunization program, said that adverse reactions are an issue of great concern to everyone.

Regarding the vaccine, it is a foreign antigen to the human body. Due to the characteristics of the vaccine and individual differences, some adverse reactions will occur after vaccination, and the overall incidence is still relatively low.

　　In addition to the adverse reactions related to the characteristics of individuals and vaccines, we can also see that this new crown vaccine is in the early stage, whether it is the results of clinical trial research or emergency use research results, or the results of post-marketing surveillance, its adverse effects Compared with the similar types of vaccines that have been used in the past, the results are similar, and there is no abnormal situation.

"Wang Huaqing said that the adverse reactions we are monitoring now mainly include local reactions and systemic reactions, local reactions, pain after vaccination, some redness and swelling, some induration, these local reactions are not It needs treatment and will heal on its own. There are relatively many systemic reactions, one is headache, fatigue, and some will have low fever. This is the result of current monitoring.

　　The adverse reaction report now comes up as a suspected vaccination abnormal reaction, that is to say, it is a suspected adverse reaction, suspected of a vaccine-related reaction. In fact, we need to investigate the more serious suspected adverse reactions involved in this follow-up. During the process, some cases need to be supplemented with examinations, to understand his vaccination history, to understand the occurrence of the entire disease, and finally a diagnosis by the expert team.

　　This requires a process and a certain amount of time. We will continue to track and evaluate these in the future.

　　(Producing Li Jiali)

Editor in charge: [Song Fangcan]