My friend's daughter is going to start school next week. Because she hasn't been vaxed in a couple years the school is telling my friend that her dd has to have the following vaxes tomorrow: polio, mmr, dtap, hepA, and a TB test. We are schedule to have Thanksgiving at our house the next day. My children are not vaxed. Only the HepA will be the first in the series of vaxes. Should we be worried about shedding?