Is there any indication that a person with idiopathic thrombocytopenia purpura should not get a second MMR?
A history of thrombocytopenia is a precaution for either dose of MMR vaccine. The benefit of preventing the adverse reaction thrombocytopenia by withholding the vaccine is potentially outweighed by the fact that thrombocytopenia also can occur as a complication of measles or rubella disease, and this could be worrisome in someone with a previous history of thrombocytopenia. It is prudent to withhold a dose of MMR from a patient with thrombocytopenia that occurred within 6 weeks of a previous dose of MMR.
