After strict monitoring and follow-up of adverse reactions, no serious adverse reactions have occurred. The common adverse reactions of New Crown vaccine include local redness, swelling and pain at the vaccination site; a few people may experience fever, malaise, nausea, headache, muscle aches and pains due to individual differences, which can generally recover on their own without treatment. It is necessary to pay attention to the distinction between adverse reactions and coincidental reactions. Adverse reactions are reactions that are not related to the purpose of vaccination or that occur unexpectedly after the standardized vaccination of qualified vaccines. A coincidental reaction is when a vaccinated person happens to be in the incubation period or pre-onset stage of some other disease at the time of vaccination, and the disease also develops at the same time when the vaccination is administered. The occurrence of this condition is not related to vaccination and is not an adverse reaction. Content source: Dr. Yurai