rualexander
Legendary Member
Being serious for a moment - difficult for me - the combination itself apparently presents no more chancemofmside effects than any other.
The original vaccine and its consitutuents are lo g since gone from your body. Therefore, there is nothing left to act as a reagent to the new vaccine. All that happens is your immune system responds to the new vaccine itself.
Yes but it reacts differently because your immune system has been primed with the first two vaccinations.