Is the MMR Vaccine a Fraud or Does It Just Wear Off Quickly?
It’s quite clear the MMR vaccine does not work as well as advertised in preventing mumps, even after most children in the U.S. have gotten two doses of MMR for several decades. Public health officials have known about the problem with mumps vaccine ineffectiveness since at least 2006, when a nationwide outbreak of mumps occurred among older children and young adults who had received two MMR shots.