I’ll be honest I haven’t done a lot of DD on m
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As much as I think Dr Yang has his own agenda/own biases, he said it best do your own homework, I highly respect his opinion on the subject of mask and he was for mask but he wasn’t as extreme as some. Like when you see people wearing them in there car driving.....
There was a YouTube video of him explaining it. Once again I’m still skeptical of a lot of information out there.