How long is the interval between the first dose of COVID-19 vaccine and the second dose of COVID-19 vaccine

Now many people go to the street health center to get COVID-19 vaccine. A total of two shots are needed for COVID-19 vaccination. After the first shot, you need to take some time before you can go to the second shot. Because there is a time interval between the two injections, some people do not know how long it will be better to take the second injection after the first injection. The second injection of COVID-19 vaccine is best in 21 days. Let's take a look at the relevant content together.

The second dose of COVID-19 vaccine is best 14-28 days after the first dose. Although COVID-19 vaccine is a kind of inactivated vaccine with high safety, the time from vaccine research and development to clinical application is very urgent, and it has not gone through comprehensive clinical trials. If it is continuously vaccinated, some people may have adverse reactions. Therefore, in order to reduce the occurrence of adverse reactions of COVID-19 vaccine, the interval between two injections should be at least 14-28 days.

The difference between one shot and two shots of COVID-19 vaccine: the difference in the protection of the body. Generally speaking, a single injection of COVID-19 vaccine can also play an antibody role, but the antibody positive rate in the body can only reach about 60-90%, which is less protective for the body, while two injections can make the antibody positive rate in the body reach more than 90%, which will play a stronger protective role for the body. However, it should be noted that vaccines cannot achieve a 100% protective effect, and some individuals may not even form antibodies after vaccination and may still be infected. Therefore, even if vaccinated, personal protection is still necessary.

The second dose of COVID-19 vaccine cannot be dispensed. Although only one shot of COVID-19 vaccine can also play a protective role, the positive rate of antibodies in the body and the lasting effect are low, and the risk of infection is still high. However, two shots of COVID-19 vaccine can increase the positive rate of antibodies in the body, and the duration will be longer. Therefore, it is recommended to continue to take two shots after the first shot.

Generally speaking, one shot of COVID-19 vaccine can also play an antibody role, but the antibody positive rate in the body can only reach about 60-90%, which has a lower protection for the body. However, two shots can make the antibody positive rate in the body reach more than 90%, which will have a stronger protection for the body. However, it should be noted that vaccines cannot achieve a 100% protective effect, and some individuals may not even form antibodies after vaccination and may still be infected. Therefore, even if vaccinated, personal protection is still necessary. At present, the vaccination target is healthy adults aged 18-59, with a total of 2 doses administered, with a 28 day interval between each dose, and at least 14 days in emergency situations.