Maybe too short, but also Covid-19 isn't really just one disease anymore, but rather a family of strains.
Just yesterday the news had an article about how a national level soccer player for Sweden who had been infected previously in the past managed to get infected again and infect parts of the team.
The player in question had been infected about a year ago initially (before the British strain was found) and with the British strain now being the main one in Sweden I don't think it's a far fetch to say that re-infections of a different strain is actually quite likely once a certain amount of time has passed.
Just yesterday the news had an article about how a national level soccer player for Sweden who had been infected previously in the past managed to get infected again and infect parts of the team.
The player in question had been infected about a year ago initially (before the British strain was found) and with the British strain now being the main one in Sweden I don't think it's a far fetch to say that re-infections of a different strain is actually quite likely once a certain amount of time has passed.