I am not a doctor (and do not play one on TV) but you will find that some shots--particularly Hep. A, I think--can only be given after a significant period of time after the others. So at this point, like our son, you may have to get at least one at I day. Also, I saw someplace where it was recommended to get H1N1 vaccine (even though udoubtedly the flu strain next year will be different next year) but we have not been able to find a provider with the vaccine. So I guess if he needs it, he gets it at I day. Good luck to all.