Is the side effect of the booster injection of Anhui Zhifei COVID-19 vaccine great? How long is the validity period of COVID-19 vaccine in China

Is there a big side effect of Anhui Zhifei COVID-19 vaccine

Anhui Zhifei COVID-19 vaccine, also known as recombinant COVID-19 vaccine (CHO cell), needs three injections. Its advantage is that after three injections, not only the neutralizing antibody level has doubled, but also the number of people recovering from COVID-19 can be doubled, and the immune effect is longer. According to data, 76% of recombinant protein vaccines can produce neutralizing antibodies after two doses of vaccination; After receiving three doses, 97% can produce neutralizing antibodies, so compared to two doses of inactivated vaccines, the three dose recombinant femoral protein vaccine is safer. Many consumers can improve symptoms such as colds, fever, and dizziness after injection, and reduce the occurrence of side effects. Some consumers may also experience pain and redness at the vaccination site after injection, which usually resolves on their own within a few days. Numerous clinical trials have shown that the safety performance of this vaccine is very good.

How long is the validity period of COVID-19 vaccine

Current evidence shows that there is little doubt about the vaccine protection period, which is more than half a year as required by WHO. The flu vaccine is administered once a year because the flu virus mutates rapidly and different subtypes are prevalent each year. COVID-19 vaccine does not need to be re vaccinated for half a year or once a year, which is optimistic and unlikely.