[mbreese]

You don't know what I'm imagining. I think that a load of approx. 3 different antigens per inoculation with a buffer of at least 6-12 weeks in between them is adequate for coverage of most vaccines. All I was saying is that the current regiment of spread out vaccines is done for a reason. The original (parent/parent/...) poster said that it was done "to be safe". My point is that it is done that way for more than one reason... chief among them efficacy. You want the antibodies that you create to last.

I know the way vaccines work.

The part that you don't get with a stock vaccine is immunity when dealing with new strains or mutations that aren't accounted for by the stock vaccine. The antigenic make up of the new strain may be different. This is why we get different flu shots every year. With something as simple as chicken pox, I don't think that there are many strains (I could only find 2 while quickly Googling), so one shot and you're covered.

But in the case of something like H1N1, someone may get the vaccine and assume they are covered. They then may get lax about standard precautions, thinking that they are covered. And then when a new strain rolls around, you're susceptible.