Dr. Howard Smith Oncall

  Vidcast:  https://youtu.be/JNv97823NnM   The most protective face masks available, excepting the N95s reserved for medical first responders, are multi-layered high-thread-count cotton and cup masks.  Mechanical engineers at Florida Atlantic University present these conclusions and provide visual proof.   These time lapse photos of each mask type show that a simple bandana offers little aerosol flow protection.  Even multilayered cotton and cup masks allow aerosol leakage around loosely fitting edges.  Tighten those babies up gang.   The most telling photo shows an un-masked cough traveling up to 12 ft, twice the so-called safe physical distance.   Heed this evidence.  When you’re out, wear the best mask you can and stay far away from all but your family.   https://aip.scitation.org/doi/10.1063/5.0016018   #covid #mask #aerosol