well, it's Bloomberg citing one person only, it's not a scientific paper. I do find it quite worrying that when news gets hold of all kind of edge cases or special cases, with barely any scientific data to back it up (from COVID causes X, Y and Z) everyone has no issue with the scarce facts. When an actual antibody test or special cases (like the one from France with more scientific explanations and detailing how a guy who was swabbed in December got a positive result), we need to be careful as the science is not valid or there are serious doubts over minor statistical error.
Which also can leave stuff out for sensationalistic reasons, which the media is known for. After all the deliberately misleading information from "the news", I no longer take it seriously and instead pay attention to peer-reviewed journals with public data.