That is an important question for your daughter which your pediatrician should answer for you. Assuming that she receives the injection or killed vaccine, it will take up to two weeks for immune competent people to develop a response. If she was in school before, there would be no reason to change; however, your immunologist and or pediatrician would be the best person to answer that question.
Wayne Yankus, MD, FAAP
expert panelist: pediatrics