I don’t know, he’s a pretty well known I his field, and he makes a pretty good case with the statistical significance that the two was by chance as less than .03. It’s definitely not a fast moving disease, and people can retest positive even weeks after testing negative. Who knows if they can still shed.
As he said, the next few genome sequences will nail it down. It’s like DNA, which is probably why Wuhan stopped submitting sequences in January.
Respect him too.
Not much of a disagreement- for example WEA1 and WA2 could have got it from the same person or people without contact between WA1 and WA2. Hope that makes sense.