Ninety-five percent of children vaccinated with the current measles vaccine develop anti-measles antibody if vaccinated at age 12 months and 98 percent if vaccinated at age 15 months. If the first dose of the two-dose measles vaccination series is given no sooner than 12 months of age, greater than 99 percent of recipients develop anti-measles antibody. Measles vaccination usually leads to long-term immunity. Loss of immunity after vaccination, termed secondary vaccine failure, has been reported but is considered rare
Reference
Measles, mumps, and rubella--vaccine use and strategies for elimination of measles, rubella, and congenital rubella syndrome and control of mumps: recommendations of the Advisory Committee on Immunization Practices (ACIP).
AUWatson JC, Hadler SC, Dykewicz CA, Reef S, Phillips L
SOMMWR Recomm Rep. 1998;47(RR-8):1.
There have been some crazy claims made on this thread.
Measles vaccine cancels natural immunity?? eh?? says who.
Immunologists would whole hartedly disagree
BBM your article shows that outbreaks occur in unvaccinated populations.
For an immunised person to contract measles is as the research states a rare occurrence