MATHEMATICS OF PANDEMICS
Exponential growth bias: The numerical error behind Covid-19
David Robson, BBC, 12 Aug 2020
Coronavirus: What is the R number and how is it calculated?
James Gallagher, BBC, 22 Jan 2021
Vaccines alone will not stop Covid spreading - here's why: see the Swiss Cheese Model
Michelle Roberts and the BBC Visual Journalism Team, BBC, 12 Apr 2021
Statistics by country and time
US Dept of Health & Human Services
Johns Hopkins Coronavirus website (lots of statistics e.g. # of tests, positivity rates by state etc.)
Daily COVID-19 Statistics for the USA - see which states are
Why COVID-19 is *NOT* just like "the flu" (7' video)
, vox.com, using sources from the Centers for Disease Control (CDC), World Health Organization (WHO) and Johns Hopkins Univ.
to Protect Yourself and Others, US Centers for Disease Control
and Reliability of COVID-19 Tests, James D. Walsh, NY Magazine
Intelligencer, 10 June 2020