Colson et al. did publish a very interesting paper on evidence of a SARS-CoV-2 re-infection with a different genotype. They sought to show that the same patient was infected in April, cleared the virus, seroconverted, but was "re-infected four months later with a new viral variant. The two infections reflect the circulating strains in Marseille at the same time. It is the most comprehensive study as it documented seroconversion following the first infection, showed drastically different viral genomes with 34 nucleotide differences, and ruled out errors of samples by techniques commonly used for forensic identifications."