By AJ Leonardi, MBBS, PhD @fitterhappierAJ
"To all the people unhappy about being sick right now: it didn't have to be this way"
SARS1 went away and its R0 was about 3.
SARS2 had an R0 below 3 when it first came out. Now it's around 10.
https://pubmed.ncbi.nlm.nih.gov/32730205/
Twitter/X source: https://twitter.com/fitterhappierAJ/status/1740121354236727552