COVID-19 size:  .125 microns (125 nanometers)

https://www.sphosp.org/wp-content/uploads/2020/04/Letter-in-response-to-N-95-use-RA-Final.pdf

https://www.cidrap.umn.edu/news-perspective/2020/04/commentary-masks-all-covid-19-not-based-sound-data

https://www.usatoday.com/story/news/factcheck/2020/06/11/fact-check-n-95-filters-not-too-large-stop-covid-19-particles/5343537002/

Covid-19 discussion with audio links.
https://www.wpr.org/latest-covid-19-outbreak-wisconsin
Wisconsin Public Radio guest Dr. Patrick Remington (https://ghi.wisc.edu/staff/remington-patrick/)

True Fatality Rate of Covid-19: Same as the Flu?
https://medium.com/microbial-instincts/clarifying-the-true-fatality-rate-of-covid-19-same-as-the-flu-8148e38b9ab5

CDC Stats/Facts
https://www.cdc.gov/flu/about/keyfacts.htm
https://www.cdc.gov/flu/about/burden/index.html

CDC Weekly Stats
https://www.cdc.gov/nchs/nvss/vsrr/covid_weekly/index.htm

Cochrane Library
https://www.cochranelibrary.com/