vaccinate, I just did my second about 5 min ago, but can't hurt,and do all the good.
Rob,
It is a good idea to have kids vaccinated against both A and B, anyone with Hep C also should be vaccinated. They may or may not have been exposed and may of may not have developed antibodies. If you want, get a hep screen for them and see, else if it was me, yeah I'd get them vaccinated for both A and B.
BTW in Florida and I think most states these vacines are now mandatory for school kids.
Doug