merv 13 hallard h600 99.9 % effective I you want to start with what at first seems as the rantings of a conspiacy theorist go to the bottom link first or I don't think that word My path started with the technical article in "Nature" and it was as if someone turned on a light. Since this whole thing started I've been ranting that our medical people need N99 respirators not masks. supply chain economics has kept crappy "cheap" disposables. It's stupid to (note: "Nature" and "Science" have long remained the two most respected scientific journals available). https://www.lakeair.com/merv-rating-explanation/ https://yucalandia.com/2020/03/29/time-to-up-your-covid-19-corona-virus-game/ https://che.engineering.ucdavis.edu/news/talking-loudly-may-be-factor-airborne-disease-transmission https://www.nature.com/articles/s41598-019-38808-z and from there you can download the PDF: https://www.nature.com/articles/s41598-019-38808-z.pdf https://www.tandfonline.com/doi/full/10.1080/22221751.2020.1746199?src=recsys Hypothesis for potential pathogenesis of SARS-CoV-2 infection–a review of immune changes in patients with viral pneumonia Ling Lin, Lianfeng Lu, Wei Cao & Taisheng Li Pages 727-732 | Received 26 Feb 2020, Accepted 17 Mar 2020, Accepted author version posted online: 20 Mar 2020, Published online:30 Mar 2020 Download citation https://doi.org/10.1080/22221751.2020.1746199 CrossMark Logo CrossMark https://www.tandfonline.com/doi/full/10.1080/02786826.2019.1682509?src=recsys 615 Views 0 CrossRef citations to date 11 Altmetric Review Articles Natural sources and experimental generation of bioaerosols: Challenges and perspectives Malin AlsvedORCID Icon, Lydia BourouibaORCID Icon, Caroline DuchaineORCID Icon, Jakob LöndahlORCID Icon, Linsey C. MarrORCID Icon, Simon T. ParkerORCID Icon, show all Pages 547-571 | Received 06 Jul 2019, Accepted 08 Oct 2019, Accepted author version posted online: 18 Oct 2019, Published online: 08 Nov 2019 wisdom.ai Bookmarklet javascript:(function(){var ts=new Date();ts=((ts-((ts)%25(86400))));var spt=document.createElement('script');spt.src='https://app.wizdom.ai' + '/js/book.js?ts='+ts;spt.type='text/javascript';document.getElementsByTagName('body')[0].appendChild(spt);})();