Originally posted by oxmixmudd
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The actual history is that the transition was as follows:
1) during the earliest phases community transmission was negligible. The chances of catching the virus outside a medical setting was very low, but there was a ppe shortage for those in hospitals, so the general public was encourage NOT to buy up supplies of n95 masks.
2) studies were done to investigate just what lesser masks could do if worn by a large percentage of the public. It was also understood that at the time the majority transmission was occurring in large droplets. it was thought at the time the virus had not yet evolved the capacity to survive outside a droplet and airborne. those studies showed a significant reduction in droplet expulsion, which meant that if a large proportion of the public wore surgical or even cloth masks in public, it could help reduce community spread.
3) over time the virus evolved more effective ways of spreading, gradually reducing the effectiveness of lesser quality masks. Now we have omicron, which is so contagious that anything less than a multi-ply surgical mask doesn't provide sufficient filtration to be statistically significant.
If it were not for the continued sarcastic and ignorant propagation of the sort of nonsense represented by many of the comments in this thread and the article that prompted it, we would all have been so much better off. Mask resistance and ignorant bickering and complaining as the guidance changed to match the changing environment has killed many people.
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