Is it necessary to get a booster vaccine in COVID-19 (is it necessary to get a booster vaccine in COVID-19, Zhihu)?

1. Is it necessary to get a booster shot of COVID-19 vaccine?

From the international situation, the world has entered a new round of infection peak, and a few developed countries have approved the third dose of booster vaccine. However, whether the booster needle is effective or not needs to pay close attention to its relevant data. This data can provide reference for formulating public epidemic prevention policies in China.

From the domestic point of view, the people in our country are mainly vaccinated by Sinopharm and COVID-19 Inactivated Vaccine of Kexing. On August 20th, Weekly of China Center for Disease Control and Prevention published online the research on the effectiveness of Guangdong Provincial Center for Disease Control and Prevention on the world's first inactivated vaccine against Delta mutant.

This study emphasizes that two doses of inactivated vaccine are needed to protect the Delta strain. Individuals who have completed the first dose should receive the second dose as soon as possible. In other words, it is feasible to strengthen COVID-19 vaccine, but the whole vaccination of COVID-19 vaccine must be completed before.

Two, COVID-19 vaccine booster when to play?

When can I inject COVID-19 vaccine booster? On August 20th, Zhong Nanshan, an academician of China Academy of Engineering, said publicly: "This is related to the effective rate of vaccine and the transmission coefficient of virus. The effective rate of vaccines in China is about 70%, so we need more than 80% of the whole population to vaccinate in order to establish effective group immunity. Now, the vaccination rate in China can reach more than 80% by the end of this year. "

From the time window of vaccination, the general population who have completed immunization within one year do not need to be injected intensively; Whether people with weak immune function and people engaged in high-risk occupations have been vaccinated for more than 6 months to 12 months is under study in China.

Anyway, you don't have to worry. Our first task is to complete the first and second injections and do daily protection. The country will open up enhanced injections for us on the premise of safety.