Seems like a reasonable fit for HN. If you are skeptical look at their collated list of papers on the effectiveness of homemade masks. https://docs.google.com/d

Seems like a reasonable fit for HN. If you are skeptical look at their collated list of papers on the effectiveness of homemade masks. https://docs.google.com/document/d/1HLrm0pqBN_5bdyysOeoOBX4pt4oFDBhsC_jpblXpNtQ/preview#heading=h.9yzpxufkt5ow https://docs.google.com/document/d/1HLrm0pqBN_5bdyysOeoOBX4p...