What time frame would these long term studies normally be done over? My understanding is most of the acceleration came in the form of ramping up manufacturing e

What time frame would these long term studies normally be done over? My understanding is most of the acceleration came in the form of ramping up manufacturing early and moving to Phase III faster, but we're now 1 year out from when Pfizer started their first study and we've obviously been giving out ton of vaccines for a bit since then. We understand pretty well what sort of side-effects come from vaccines and they aren't invisible for this long