The data I have seen is that masks are ineffective (they only block water droplets like saliva) at best and some can cause lung cancer (the blue ones are sterilized with ethyline oxide and contain PTFE in them) at worst. Please provide location of your research so we can see where your information is coming from. There were no studies that said masks are effective against viruses prior to March 2020 so I’d like to know where your data is coming from. I am not looking to make a machlokes. I am genuinely interested. Thank you.
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