The most effective vaccine is -
TT
OPV
B.C.G
Measles
.most effective vaccine is the live attenuated vaccines for measles.it is presented as afreeze dried product.0.5 ml contains more than 1000 vral infective units of the vaccine strain.uually given after 9 months of age along with vit A prophylaxis as per national immunisation schedule. ref:park&;s textbook,ed 22,pg no 140
Epidemiology