To be fair, some vaccines offer lifetime protection and many people may not have realised how unusual that is. So since I don't recall the manufacturers emphasi

To be fair, some vaccines offer lifetime protection and many people may not have realised how unusual that is. So since I don't recall the manufacturers emphasising that these vaccines were unlikely to offer lifetime protection, I can see one might make an unwarranted assumption. But I cannot see how one might be annoyed about it later.