Can A Child Still Get A Mild Version Of Chicken

Can a child still get a mild version of chicken pox if she has had the varicella vaccine? She has had a low grade fever the last few days and these little chicken-pox looking spots (about 12) have shown up on different places on her body (arms, legs, back, tummy, neck). She has had two doses of the varicella vaccine. What else could be causing these? Should we be concerned. Otherwise she seems to be recovering from this little flu bug just fine. Thanks!