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Examples of 2nd full blown infection 3-4 months after 1st COVID infection. Not talking about lingering PCR positive here.

Each person’s immune system is different, but do you really want to find out the hard way?

More examples of COVID reinfection from physicians

One preprint on short half-life of COVID IgG

technologyreview.com/2020/07/13/100…

We are only 4-5 months behind the first wave, so data is very limited. Only time will tell. Assuming that herd immunity with a single infection would work is most likely wishful thinking.
Link to the preprint here:

medrxiv.org/content/10.110…
Huge variability in immune response (from genetics, nutrition)

IgG and IgA are the more important ones.
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