RE: reader comments    It keeps amazing me what some people pull out of their backsides and so often it is so obvious they don't have a clue, or have done a stitch of research behind what they say.

There's a strong selection bias in such comments.  It's mostly the whackadoodle, conspiracy loving, anti-vax folks who get emotional about it and are the most motivated to post on such a video.  Regular, sensible folks don't bother.