Can the second injection of COVID-19 be dispensed with? How many people can be vaccinated to form group immunity

Is it OK not to take the second shot of COVID-19 vaccine

It is OK to take only one shot of COVID-19 vaccine, but the prevention effect will be reduced. According to relevant information, the secondary vaccine has a 100% protection rate and is priced below 1000 yuan. After one vaccination, the protection rate is about 97%. The production and growth of antibodies are slow, like a curve. Under normal circumstances, about half a month can reach the level of resistance to COVID-19. If you receive two doses of the vaccine, you will receive 100% protection.

The number of vaccinated individuals required to form herd immunity

varies depending on the transmission coefficient of different infectious diseases. In terms of infectivity, measles and pertussis are relatively strong. To prevent their spread, the population's immunity needs to reach 90-95%.