Dude, give it up. Science isn't about cherry picking studies to try own people on the internet. It's a methodical and ongoing process of observation, measurement and investigation. Each study provides new data. We learn. We adjust our theories. There is no contradiction when one study makes one observation and many others (in the case of masks and COVID) make a different one. You're supposed to look at all the evidence together. Or, you know, just trust the consensus of actual professionals, instead of arrogantly drawing your own conclusions to support your pre-existing bias on topics where you have no context or training.
People have been wearing face coverings for centuries to protect themselves and others from infection. Don't you think if they were completely useless folks would've stopped doing it by now? Especially in countries like the US where healthcare is privatized. Private hospitals cut costs anywhere they can. So why do healthcare professionals in the country continue to wear PPE? It's not a conspiracy. It's just common sense. Seriously. Just let it go.
People have been wearing face coverings for centuries to protect themselves and others from infection. Don't you think if they were completely useless folks would've stopped doing it by now? Especially in countries like the US where healthcare is privatized. Private hospitals cut costs anywhere they can. So why do healthcare professionals in the country continue to wear PPE? It's not a conspiracy. It's just common sense. Seriously. Just let it go.