The US currently has the largest measles outbreak since it was considered eliminated in 2000. Currently there are no reported cases in Delaware. The CDC recommends vaccination with the MMR vaccine for all eligible children or adults that did not complete the vaccination schedule as a child. Adults born before 1957 do NOT need vaccination as they are considered immune due to an extensive outbreak of measles that year. So, the message is.... get your kids vaccinated with the MMR vaccine. As adults, you most likely do not need a vaccine.