> In a nutshell, you can't catch it again right away after having recovered.

If that's the case, out of curiousity why there has been numerous reported cases of people that catched covid again after already recovering from it?

Edit: So... after reading the article I'm not sure this is the case for all people as this research has been done only on a group of asymptomatic & low/mild response people. IMHO for a sentence like that to be valid, it should be demonstrated on the other part of the population, those that have a high immune response against the virus and end up in a critical state from it.