The Lancet has an article about a 25 year old man in Nevada who tested positive for COVID-19 in April and recovered but then at the end of May, he was infected again. He did not have any serious underlying conditions and there were no indications his immune system was compromised. But on May 28, he felt sick and on May 31 he got tested, and his test was positive. hThis time his symptoms were more severe.

We present, to our knowledge, the first North American case of reinfection with SARS-CoV-2. A 25-year-old man, who was a resident of Washoe County in the US state of Nevada, had laboratory-confirmed SARS-CoV-2 infection in April, 2020, followed by secondary infection within a period of around 6 weeks, in June, 2020. The second infection was symptomatically more severe than the first. Genomic analysis showed the two viral agents were genetically distinct. The patient's immune reaction in vitro was not assessed and, thus, conclusions cannot be made about the duration or degree of immunity.

The Lancet reports that at least 4 people have been reinfected. Does this man immunity Herd does not exist or individual immunity is not be a sure thing (unless you are a contestant on Survivor)? [More...]