There is no controversy about the need to wear a mask to reduce the possibility of COVID-19 transmission. Every scientific research that I've read supports that.
Here are some more from the physics side of it. This is approaching it from purely the point of view of physics of fluids.
Visualizing droplet dispersal for face shields and masks with exhalation valves
Visualizing the effectiveness of face masks in obstructing respiratory jets
On respiratory droplets and face masks
Zz.
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