Vidcast:  https://youtu.be/1wYX4J_9dpo   To prevent resurgence of CoVid as business and school resume, take a page from our healthcare worker’s self-protection playbook.  Physicians at the University of Iowa encourage us to create PPE for ourselves without denying it to heroic professionals.   Equipped healthcare staff have CoVid infection rates a fraction of those in the general population despite constant exposure.  The Iowa investigators suggest that you can achieve similar protection by adding clear plastic face shields to your cloth masks.  The shields, made from acetate sheets you can buy at Staples and a hole punch, block 92-96% of virus.   Best news: face shields can be repeatedly cleaned and reused.   https://jamanetwork.com/journals/jama/fullarticle/2765525   #covid #coronavirus #faceshield #mask #ppe