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@alicegoldfuss ("malice ghoulpus") retweeted:
@jeffgilchrist ("Dr. Jeff Gilchrist") wrote:
How #respirators actually work and which type is best?
I see many claims #masks don't work. This thread will explain *how* they block #viruses much smaller than the size of the holes in the #filter and why you can still smell nasty things while wearing effective masks. 🧵1/
