The third vaccine in China refers to the new coronavirus vaccine. It is not Pfizer and does not use Pfizer’s vaccine. The domestic neocoronazole booster shot is currently using vaccines from five companies: the inactivated neocoronazole virus vaccine produced by China Biologicals, the inactivated neocoronazole virus vaccine produced by Beijing Kexing, the inactivated neocoronazole virus vaccine produced by Wuhan Biologicals, the recombinant subunit vaccine produced by Anhui ZhiFeiLongKeMa, and the adenovirus vector vaccine produced by KangXiNuo. At the same time, China promotes sequential vaccination on the basis of two doses of inactivated vaccine for the whole course of vaccination. That is, people who have received two doses of inactivated vaccine can choose the adenovirus carrier vaccine for the third time, which is a different vaccine technology from the previous vaccine, and is able to significantly increase the level of antibodies in the vaccinated person. If you feel unwell after vaccination, it is important to give prompt feedback to the vaccinating doctor to avoid adverse consequences. Tip: “New coronavirus pneumonia and new coronavirus pneumonia” mentioned in this article were renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.