It is already possible to combine multiple vaccines into a single shot. This approach is used for other diseases, such as the MMR (measles, mumps, and rubella)

It is already possible to combine multiple vaccines into a single shot. This approach is used for other diseases, such as the MMR (measles, mumps, and rubella) vaccine. In the hypothetical case you're describing, I would expect that consolidation of vaccine administration would happen before we reach a point where you need to get half a dozen separate jabs at your annual well visit.