Dr. Howard Smith Oncall

x Vidcast:  https://youtu.be/IbrJaVthGac   Just how well do face masks work to block the spread of virus.  Researchers from Case-Western U and Ohio State University studied the dispersion of artificially-created droplets through cloth masks of various designs mimicking an infected sneeze.   A single layered mask constructed of various fabric types reduce the droplet spread to less than 1 foot.  A double layered mask cut the droplet dispersion by a factor of two-thirds down to 4 inches.   Problem is, viruses spread in aerosols that travel further than droplets and through masks.  Multiple cloth layers offer more but not complete protection.  You must depend on physical distancing and an abundance of caution to fill the void.   https://www.medrxiv.org/content/10.1101/2020.04.07.20045617v1   #covid19 #coronavirus #mask #fabric #aerosol