Originally posted by rogue06
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Mask advice changed because what was the best advice for the moment changed as we learned about the virus and as perspectives changed and as the availability of masks changed. At first the perspective was protecting the wearer from infection coupled with an n95 mask shortage.
That set of variables says anything other than an n95 isnt going to help enough protecting individuals in the community with minimal spread to justify depriving doctors and nurses on the front lines of the equipment they need.
But when looking at the high percentage of asymptomatic cases and taking on the alternate perspective of reducing the number of small droplets in the air in an enclosed space as community spread was increasing, the advice needed to change. That changed perspective coupled with new research made it clear even a cloth mask can help reduce the R value, the number of persons infected as a result of a single case. It became clear that even though the personal protective value of a cloth mask was not sufficient to give robust individual protection from acquiring the disease, when the entire community would wear them, it could significantly impact community spread rate.
That knowledge, the growing amount of community spread, the growing availability of the masks and the realization multilayer masks could help and be created at home by individuals for themselves changed what was the best advice.
That is simple reality. The advice given was the right advice for the times in which it was given. It was the correct advice based on what was known at the time it was given and the level of spread at that time.
Again, this ignorant rhetoric you are echoing is below a man of your intelligence. You know what I have outlined above is what was the situation and what is the science and the history of the situation. Please let that knowledge temper your posts here.
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