Which six vaccines are approved by the World Health Organization?

As of July 6th, WTO*** has approved the following six vaccines:

1, China 2: National Medicine, Kexing;

2. Three American companies: moderna, Pfizer and Johnson & Johnson;

3. Britain1:az;

4. Germany 1: BioNTech.

COVID-19 vaccine type:

1, only one injection is adenovirus vector vaccine. Generally speaking, adenovirus, like a truck, can carry COVID-19 nucleic acid fragments, which can be efficiently transported to cells to express antigens, and one injection can induce immune protection response.

What needs two shots is inactivated vaccine, which is the traditional vaccine that everyone is familiar with. Inactivated live virus is inoculated into human body as antigen, and the composition of vaccine is the closest to that of natural virus.

3. What needs three shots is recombinant protein vaccine, which is to make the most effective antigen component into vaccine through genetic engineering. Although these three vaccines are of different types, they are all safe and effective.

The above contents refer to Baidu Encyclopedia-novel coronavirus Vaccine.