Exactly two different issues. 
It’s probably closer to like 10x, that 50x study has been widely criticized for biased sampling and poor statistical analysis
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Agreed. The issue with the antibody tests seems to be poor specificity, i.e. high false positive rate. There are other coronavirus’ out there that cause the common cold. Can the antibody tests reliably tell the difference? The CEO of Roche came out and said most of these tests were garbage. Then again he is not unbiased. Time will tell…
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