What can possibly happen to my daughter's health if i do not give the other two doses of the vaccine?

Which vaccine?: In general, it is important to complete the entire series of vaccinations for a particular disease. Not finishing can leave you still susceptible to the disease you are trying to prevent. Unless your daughter had some major side effect, i would recommend finishing. While many diseases in the us are rare, your child may travel as an adult or meet someone who carries the disease.