We had a Zoom prayer meeting last night and one of those attending shared that he contracted Covid earlier in the year, positive test and because of his job has access to antibody tests which are now "negative".
My thinking would still be on the lines though that if you get repeated exposure would your immune response grow/remain? Even if reinfected would that trigger a faster and better immune response? If for herd immunity you need repeated exposure how do we manage that?
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On a lighter note, don't know if this has been shared already. It's a parody on the 1970's info films -
https://www.youtube.com/watch?v=5q7HkxNhnXA