I just want to put out a quick PSA. This guy is an experienced scientist, was VP of a giant pharma company, has a doctoral degree, is intelligent and engaged, etc, and it took him two and half years to get it.

So if you're having trouble talking to your family member or friend or co-worker or whoever about germ theory and it's problems, try to have a little patience and mercy. It shouldn't be surprising that it's taking them longer than it did Yeadon.