What is the difference between the first stitch and the second stitch of COVID-19? Is COVID-19 vaccine only for half a year

The difference between the first dose of COVID-19 vaccine and the second dose

The main difference between the first dose of COVID-19 vaccine and the second dose is that the first dose is the basic dose, and the second dose is the intensive dose. Generally, in clinical statistics, after the first injection of COVID-19 vaccine, the protection rate can reach about 97%, but the antibody production is relatively slow. At this time, the second injection of COVID-19 vaccine can be inoculated at intervals, and the protection rate can reach about 100% as far as possible. Usually, two injections of COVID-19 vaccine are given now. The interval between the first and second injections is about one month, usually four weeks. Usually, according to the standard vaccination schedule, many people try to approach a 100% protection rate.

Does COVID-19 Vaccine Only Care for Half a Year?

At present, there are only half a year's data. The protection period of COVID-19 vaccine is not only half a year, but only because the time from research and development to marketing of COVID-19 vaccine is relatively short. At present, only half a year's data is available, not only half a year. With the passage of time and data update, nine months' data will appear soon. Further research is needed on the persistence of vaccines to confirm how long their protection period is.