Can a child have chicken pox even if she has been vaccinated?

Chickenpox: Chickenpox after vaccine can occur in two different situations. The more common of the two is a breakthrough infection, which is believed to be caused by a wild-type varicella virus. The second situation, in which you catch chickenpox from the chickenpox vaccine itself, is extremely rare. Second-time chickenpox cases are typically very mild.

Yes: After the first vaccine the immunity lessens and you could get chickenpox but it usually very mild. After the second dose of the vaccine the risk of infection is almost none.

Definitely: That is why they get two sets of varicella vaccine now to get a100% protection!one at 1 and 4 years old.First one gives you about 95%protection, that is why some children develop mild case of chickenpox despite getting the vaccine.