plus if there was actually something bad in the first two doses, how else are they going to undo the damage without a third shot? After all yesteryear's treatme

plus if there was actually something bad in the first two doses, how else are they going to undo the damage without a third shot? After all yesteryear's treatment might no longer be a treatment at all and we might need to deal with that as things turn out to be more complicated than "Two weeks to flatten the curve".