Measles - 7 letters - 7 days after rash onset; Mumps=parotitis - 9 letters - 9 days after onset; RuBELLA-5 days after you start not looking "bella" - bella = 5 letters; Pertussis: "Per(t) Us, Sis" you have to stay in isolation for 5 days after therapy (ussis - 5 letters)
