得过的等三个月再打疫苗。再次感染不常见，但是有。CDC这样说的：https://www.cdc.gov/coronavirus/2019-ncov/vaccines/faq.html#Getting If I have already had COVID-19 and recovered, do I still need to get vaccinated with a COVID-19 vaccine? Yes. Due to the severe health risks associated with COVID-19 and the fact that reinfection with COVID-19 is possible, you should be vaccinated regardless of whether you already had COVID-19 infection. If you were treated for COVID-19 symptoms with monoclonal antibodies or convalescent plasma, you should wait 90 days before getting a COVID-19 vaccine. Talk to your doctor if you are unsure what treatments you received or if you have more questions about getting a COVID-19 vaccine. Experts do not yet know how long someone is protected from getting sick again after recovering from COVID-19. The immunity someone gains from having an infection, called “natural immunity,” varies from person to person. It is rare for someone who has had COVID-19 to get infected again. It also is uncommon for people who do get COVID-19 again to get it within 90 days of when they recovered from their first infection. We won’t know how long immunity produced by vaccination lasts until we have more data on how well the vaccines work. Both natural immunity and vaccine-induced immunity are important aspects of COVID-19 that experts are working to learn more about, and CDC will keep the public informed as new evidence becomes available.
请教一下得过新冠的是不是有免疫不需要再打疫苗了?
现在一般认为，得了新冠痊愈后，三个月内一般不会再得。但是三个月后并不保险。疫苗现在的数据支持至少保护六个月，但有可能更长。
非常好的总结！ 现在很多人二次感染。
打抗体三个月之后才能打疫苗
二次感染需要数据来支持，全球二次感染没多少，美国目前确定有5例，你可以查。
得过的等三个月再打疫苗。再次感染不常见，但是有。CDC这样说的：https://www.cdc.gov/coronavirus/2019-ncov/vaccines/faq.html#Getting
If I have already had COVID-19 and recovered, do I still need to get vaccinated with a COVID-19 vaccine?
Yes. Due to the severe health risks associated with COVID-19 and the fact that reinfection with COVID-19 is possible, you should be vaccinated regardless of whether you already had COVID-19 infection. If you were treated for COVID-19 symptoms with monoclonal antibodies or convalescent plasma, you should wait 90 days before getting a COVID-19 vaccine. Talk to your doctor if you are unsure what treatments you received or if you have more questions about getting a COVID-19 vaccine. Experts do not yet know how long someone is protected from getting sick again after recovering from COVID-19. The immunity someone gains from having an infection, called “natural immunity,” varies from person to person. It is rare for someone who has had COVID-19 to get infected again. It also is uncommon for people who do get COVID-19 again to get it within 90 days of when they recovered from their first infection. We won’t know how long immunity produced by vaccination lasts until we have more data on how well the vaccines work. Both natural immunity and vaccine-induced immunity are important aspects of COVID-19 that experts are working to learn more about, and CDC will keep the public informed as new evidence becomes available.