Earlier quoted context omitted.
It was apparent very early that there were spread patterns only explainable by aerosols. The Diamond Princess was the earliest publicized example, with cases occurring onboard despite isolation in cabins. Japanese experts understood the lesson immediately and implemented a "three C's" approach to counter airborne spread: avoid close contact, closed spaces, and crowds. Western governments and experts and the WHO inste…
While it took way way way too long for the scientific community to recognize airborne spread, it's hard to say that stuff like Diamond Princess could ONLY be explained by airborne spread. It was early in the pandemic, the disease was poorly understood. It's hard to know if the quarantine was effective--passengers could have continued socializing, sick workers distributing food may have been spreading it, etc. It's a…
I would make that more specifically as referring to the Western public health establishment, especially the CDC and WHO. Actual scientists were comfortable saying recognition was overdue fairly early on, reaching the point in July 2020 where a large group published an open letter: