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The details of "Precautions after COVID-19 Vaccination" are as follows:

1. After inoculation, the recipient should stay at the inoculation unit for 30 minutes. During the stay, if the recipient has symptoms such as pale face, sweating, wet and cold limbs, rash, weak pulse, cyanosis, swelling of face and throat, dyspnea, etc., please contact the doctor at the inoculation site immediately.

2. After inoculation, take more rest and drink more water, keep the injection site clean and sanitary, and massage the injection site without washing or squeezing to prevent local infection.

3. After vaccination, check the vaccination appointment and master the time of next vaccination.

4. In case of fever, local swelling, pain and other reactions after vaccination, in addition to symptomatic treatment, the doctor of the vaccination unit should be informed in time to make relevant records; Very few people may have high fever or continuous fever for several days or other more serious conditions, so they should go to the hospital in time to prevent delay.

5. Vaccination is one of the main measures to prevent COVID-19. After vaccination, preventive and control measures such as wearing masks, washing hands frequently and taking body temperature should still be adhered to.

In the current situation in China, what proportion of people vaccinated with COVID-19 vaccine need to reach to stop the spread of the virus?

The transmission power of different infectious diseases is different, so the population immunity level that needs to be formed to block the epidemic among the population is also different. For example, measles and whooping cough are highly infectious. The immune level of the population must reach 90% - 95% to stop their epidemic. Smallpox has been eliminated because the immune level of the population has reached more than 80%.

According to the results of previous research, the threshold of population immunity level is about 70% when blocking the transmission of COVID-19, which is proportional to the protective effect of the vaccine and the vaccination rate of the vaccine. After the first step of implementing the immunization of key populations, it will be extended to other populations in the future. When the vaccination rate in the population reaches a very high level, this immune barrier will be established. Therefore, we hope that when you have the opportunity to vaccinate, you should plant as many as you can, and we hope that the epidemic of COVID-19 will be terminated through immunization prevention measures, or that it will be controlled at a very low intensity, with only some sporadic cases.