Link. Things mainstream physicians thought were wrong at the time:

1. Masking when outdoors (I think was effectively ignored).
2. Confusion about what cloth masks were good for (reduce transmission from sick people) and when they were low value (protecting the wearer).
3. Failure to clarify what ages were at risk early on (came a bit later) and the case for school closures prior to vaccination (staff risk and kid spread).

Today we still see young people wearing cloth masks outdoors and few wearing effective masks when boarding airplanes.

Ironically what persists most ow