Just after Trump twittered to now be immune
https://www.ctvnews.ca/health/coronavirus/first-case-of-covid-19-reinfection-confirmed-in-the-u-s-study-1.5142116
The first study to confirm a case of coronavirus reinfection in the U.S. found evidence that an individual with no known immune disorders or underlying health conditions was infected with SARS-CoV-2, the virus that causes COVID-19, in two separate instances.
According to a new case study, published Monday in The Lancet, the 25-year-old Nevada man was infected by two different SARS-CoV-2 variants within a 48-day timeframe, while testing negative between each infection.