[roving]

They were advertised as 100% effective.

https://www.fda.gov/emergency-preparedness-and-response/mcm-legal-regulatory-and-policy-framework/pfizer-biontech-covid-19-vaccine-frequently-asked-questions

On December 11, 2020, the U.S. Food and Drug Administration issued the first emergency use authorization (EUA) for a vaccine for the PREVENTION of coronavirus disease 2019

[newzjunkey]

Disease is not infection. Kind of like the difference between having HIV and AIDS