Abstract
Vaccine development and vaccination are the most effective means to prevent and control coronavirus disease 2019 (COVID-19). At present, there are 4 types of COVID-19 vaccines approved for emergency use by the World Health Organization and approved conditionally for marketing and emergency use by State Drug Administration of China, including inactivated vaccine, recombinant protein subunit vaccine, messenger RNA vaccine, and adenovirus vector-based vaccine. Pre-marketing clinical studies show that the vaccines above-mentioned can effectively stimulate the body's immune system to produce antibodies against COVID-19, the overall safety is good. Most of the adverse events after vaccination are mild or moderate. However, COVID-19 vaccination involves a large number and wide range of people, and its safety problems can not be ignored. The medical workers and researchers should be on high alert and conduct long-term monitoring to ensure vaccine safety. Copyright © 2021 by the Chinese Medical Association.
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