Dr. Howard Smith Oncall

  Vidcast:  https://youtu.be/UmUmQVbG8u0   Mask wearing reduces CoVid cases by 88% in the absence of any other defenses.  Who cares you say now that we have the CoVid vaccines?  Well think again. Your vaccine defense wanes continuously to the point where it’s only partially protective against the aggressive and now ubiquitous Delta variant by 6 months. And beyond Delta, we have the Lambda variant, which is even worse.   So masks.  Researchers at UC-Davis analyzed CoVid data for 20 weeks from February to July, 2020, way before any vaccines were available.  About 420,000 persons were surveyed about mask-wearing and other mitigation efforts.  Mask-wearing was THE most effective protection against CoVid followed by quarantine and immigration restrictions.  On the other hand, use of mass transit was a CoVid spreader.   In the face of threatening variants and declining vaccine immunity, your only reasonable defense is a good mask and solid scientific guidance. By good, I mean a KN95 or an N95 dust, non-medical mask