At this point, even if tomorow a 100 percent safe and effective covid shot was made, there would be such a huge diversity in vaxination statuses, it woudn't be compatible with 80 percent of population.
@LukeAlmighty If they indeed made a 100% effective and safe C19 vaccine, how would we know? They've pissed away all the trust in their industry when they made shameless corruption their central mode of operation. If something truly dangerous shows up, there's no trusted voice who could tell us. If they created a great therapy, there's nothing they could say which would be believable.