“ How do we know that the increase in cancellations is due to vaccinations, and not some other cause?”
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He/she just makes things up as he/she goes along. Might as well claim the current high temperatures in the Pacific Northwest are caused by mRNA vaccines.
He/she just makes things up as he/she goes along.
Who is he/she??
Well, not completely made up in this case, just half-baked. If it were me, the correlation would be interesting enough to motivate further investigation, but not to yell “fire”.