Discussion»Statements»Rosie's Corner» Pfizer ADMITS IT DOES NOT KNOW IF ITS VACCINE WORKS! Hundreds of trials worldwide are in progress. Odds of any one of them working?
Oh I am sure at least some will work but it will be a long time before anyone can be really sure, and although other Corona virus strains are common and been around for a long time this SARS-Covid-19 version is new to us and seems a particularly tough and flexible one.
Like the vaccine for Influenza (also a Corona-virus disease) we may also need annual doses to keep up with the virus mutating slightly for its own survival.