We don't really know much about how strong or long lasting natural immunity from infection is so we aren't relying on it and can't make any assumptions. However

We don't really know much about how strong or long lasting natural immunity from infection is so we aren't relying on it and can't make any assumptions. However, immunity from the vaccines is well studied and it's perfectly safe for someone with a history of covid infection to receive a vaccine. The Trumps both received vaccines before leaving the Whitehouse even though they had prior covid infection. I know at least 4 people with prior covid infection who have received vaccines https://www.cdc.gov/vaccines/covid-19/info-by-product/clinical-considerations.html https://www.cdc.gov/vaccines/covid-19/info-by-product/clinic... >Data from clinical trials indicate that the currently authorized COVID-19 vaccines can be given safely to people with evidence of a prior SARS-CoV-2 infection. People should be offered vaccination regardless of history of prior symptomatic or asymptomatic SARS-CoV-2 infection. Viral testing to assess for acute SARS-CoV-2 infection or serologic testing to assess for prior infection is not recommended for the purposes of vaccine decision-making.