annual incidence rates of sspe per million cases of measles ranged between 6.1 and 40.9 ( mean , 16.1 ) in the 10 measles epidemic years 1968-1977 , and those following vaccination with further attenuated live vaccine were zero in most years and at the highest 3.08 ( mean , 0.9 ) per million doses of distributed vaccine .
C0042211
attenuated live vaccine
C0042210
vaccine