Нужно ли вакцинироваться, если только что переболел и есть антитела?

Всемирная Организация Здравоохранения (ВОЗ, она же WHO)

и Центр по Контролю и Профилактике Заболеваний США (CDC) считают что да, вакцину делать нужно.

Вольный перевод написанного ниже:

Если вы во время болезни получали лечение моноклональными антителами или плазмой переболевших, или когда либо страдали от мультисистемного воспалительного синдрома - то не ранее, чем через 90 дней после болезни. В противном случае вакцинируйтесь тогда, когда вакцина будет вам доступна.

Ниже ссылки с цитатами с официальных сайтов этих организаций.

https://www.who.int/news-room/q-a-detail/coronavirus-disease-(covid-19)-vaccines

Should I be vaccinated if I have had COVID-19?

Even if you have already had COVID-19, you should be vaccinated when it is offered to you. The protection that someone gains from having COVID-19 will vary from person to person, and we also don’t know how long natural immunity might last.

https://www.cdc.gov/coronavirus/2019-ncov/vaccines/faq.html

If I have already had COVID-19 and recovered, do I still need to get vaccinated with a COVID-19 vaccine?

Yes, you should be vaccinated regardless of whether you already had COVID-19. That’s because experts do not yet know how long you are protected from getting sick again after recovering from COVID-19. Even if you have already recovered from COVID-19, it is possible—although rare—that you could be infected with the virus that causes COVID-19 again. Studies have shown that vaccination provides a strong boost in protection in people who have recovered from COVID-19. Learn more about why getting vaccinated is a safer way to build protection than getting infected.

If you were treated for COVID-19 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.

If you or your child has a history of multisystem inflammatory syndrome in adults or children (MIS-A or MIS-C), consider delaying vaccination until you or your child have recovered from being sick and for 90 days after the date of diagnosis of MIS-A or MIS-C. Learn more about the clinical considerations people with a history of multisystem MIS-C or MIS-A.

Experts are still learning more about how long vaccines protect against COVID-19. CDC will keep the public informed as new evidence becomes available.