Right now the vaccines are effective against current mutations but yes! It’s very likely that we’ll see more than one covid vaccine during our lifetimes as it mutates.
@OP [cyptus] this is a good question, there is no need for animal resivoir to establish variants/mutation as this happens concurrent with human infection as well.
@spivak you sound on track, the current thought in the lab is polyvalent vaccine. The problems include mRNA duplex interference, meaning 2 species of mRNA may anneal at complementary regions of the sequence to produce localized folding that derails the translation enzymes of the host.
