@TheBird just found this and saved link to your #Covid database. Thanks. I have saved lots too from #Twitter threads in #threadreaderapp to articles, most in my files and #Epocrates excellent resource for doctors and nurses which is why I have it. Early on @drericding had a thread on the #CRBox and I gave the instructions to friends, one a school principal and one a teacher as schools here have inadequate filtration MERV 8 HEPA best. Masks N95, KN95 what I wear.