Is the booster injection of COVID-19 vaccine safe? What are the adverse reactions of the third injection of COVID-19 vaccine

Is COVID-19 Vaccine Safe

According to the existing official monitoring data, the safety of subjects after COVID-19 Vaccine is very good. Up to now, there have been no reports of serious adverse reactions received or observed. The adverse reactions that have occurred are mostly mild, such as local pain and swelling at the vaccination site, as well as transient fever and fatigue. But these adverse reactions can occur during the clinical stage and large-scale use of any vaccine after its launch. So from this point of view, the four COVID-19 vaccines under phase III clinical trials in China are relatively safe.

However, even so, it is still necessary to remind everyone that when selecting people who have received emergency vaccination of COVID-19 vaccine in phase III clinical trials, they should still pay attention to avoid being at high exposure risk during the epidemic, in order to prevent the vaccine from being ineffective or ineffective, but increasing the risk of infection. In addition, if adverse reactions such as redness, swelling, pain or fever occur at the vaccination site after the vaccination of COVID-19 vaccine, they will generally relieve themselves in about 2-3 days, and generally do not need special treatment. If the discomfort symptoms are severe or other serious adverse reactions occur, timely medical treatment should be sought.

What are the adverse reactions of COVID-19 vaccine

Any vaccine will produce certain adverse reactions in the clinical stage and in the process of large-scale use after marketing, and COVID-19 vaccine is no exception. Its adverse reactions include: local reactions, including redness, swelling, pain, induration, etc. at the vaccination site; Mild adverse reactions throughout the body, including transient fever, fatigue, etc. Other serious adverse reactions are relatively rare. In addition, the vaccine related ADE effect has not been found after the COVID-19 vaccine has been inoculated, but whether there is rare ADE risk still needs to be closely monitored in large-scale phase III clinical applications and even in larger population applications after marketing. The AED effect, also known as antibody dependent infection enhancement effect, refers to the phenomenon where exposure to the virus after vaccination actually exacerbates the symptoms of viral infection.