https://twitter.com/EricTopol/status/1388636374459314178
People who have recovered from covid get big protection from just one shot of mRNA vax.
Maybe no benefit from second.
Article on the 1957 flu epidemic response.
https://www.zerohedge.com/covid-19/niall-ferguson-how-ikes-1950s-america-beat-asian-flu-science-common-sense