RE: 3billion RTC tests24 Nov 2020 13:26
"The safety of the vaccine is, as we currently know, good, so no need to test."
You wouldn't test for safety reasons during a vaccination programme. You'd be testing to see whether or not the vaccine has invoked a response. Safety concerns, including reported adverse reactions, would be reported through the Yellow Card system.
We have to bear in mind that these are new vaccines, two of which (Pfizer and Moderna) are of a type that have never been licensed for use in humans before. They have been developed in a fraction of the time normally taken and not subject to the longitudinal tests that would normally be carried out.
Even if every person who gets the vaccine is not tested, there will be a significant level of testing, over a long period of time, to measure efficacy in invoking a response and to ascertain longevity of cover.