What are the five manufacturers of the third dose of COVID-19 vaccine in China? How did COVID-19 vaccine become the third dose

What are the five COVID-19 vaccine manufacturers in China?

It was found that China's COVID-19 vaccine R&D enterprises specifically include Sinopharm Sinopharm Sinopharm, Concino, Sinovac, and Zhifei Biotech. Among them, companies that involve listed companies include CanSino, Sinopharm Group, and Zhifei Biotechnology. As investors, you can pay attention to these stocks, but you need to be alert to volatility risks.

How did the COVID-19 vaccine become three shots; A few people are those who do not respond to COVID-19 vaccination. Since COVID-19 vaccination has just started, the proportion of people who do not respond has not been calculated, which is also possible; The third possibility is that two doses of inactivated vaccine were administered, but the antibody titers were insufficient, and a third dose may need to be administered.