<prompt> Which of the following vaccines is most sensitive to heat?Oral Polio vaccineBCG vaccineDPT vaccineMeasles vaccine  <response>: - Heat sensitive vaccines: OPV - most heat sensitive. Hence stored in freezer Reconstituted BCG Measles vaccine Note: For heat sensitivity: Reconstituted BCG OPV BCG -Light sensitive vaccines: Measles vaccine BCG Rota JE vaccine -Freeze sensitive vaccines: Hep B Pentavalent TT DPT vaccine 