Why do some people get infected after three injections of COVID-19 vaccine?

1. Insufficient antibody titer: As time goes by, the antibody titer in the body may be decreasing, which is not enough to resist virus infection at present. This antibody needs to be vaccinated as soon as possible to increase the antibody titer in the body. Pay attention to wearing a mask when going out and wash your hands correctly with hand sanitizer and water. Through a reasonable diet, ensure adequate sleep time, strengthen exercise and improve your immunity and resistance. Diet is mainly light and digestible food, avoiding greasy and spicy food, such as hot pot and barbecue.

2. No antibodies: Some people did not respond well to novel coronavirus vaccine, so they did not produce antibodies after vaccination. We must isolate ourselves, and we also need to disinfect ourselves and our homes. If you catch a cold or get an upper respiratory infection during vaccination, it may also lead to vaccination failure. In addition, like other vaccines, the protection rate of vaccination in novel coronavirus is not 65,438+0,000%, so you should maintain good living habits after vaccination with novel coronavirus vaccine. Go out as little as possible, wear a mask when going out, and keep a distance from people. After the COVID-19 vaccine, it will still be infected, because the vaccine can't protect 100%. Can only improve the body's immunity, reduce the probability of infection, and prevent particularly serious lesions after infection.

3. No vaccine can achieve the protection of 100%. Some vaccines will certainly produce certain antibodies after injection. When the virus enters the human body, the antibody will have certain resistance to the virus, so it can inhibit the growth and reproduction of the virus. The number of viruses that grow and reproduce is relatively small, which is not enough to cause serious diseases, but because there are viruses that enter the body, there will be a small amount of reproduction, so there will be some infections.

After some people are vaccinated, due to personal physical reasons, the number of antibodies produced in the body may be relatively small, so there is still the possibility of infection. Because after all, everyone's physique is different, so the reaction after vaccination is also different. However, clinical trials show that vaccination can effectively strengthen the protection rate.