<prompt> Which vaccine among the following options is not kept in the freezer component in Cold ChainOPVMeaslesDPTRubella  <response>: Ans. is c i.e., DPT o A vaccine which must be stored in the cold part but never allowed to freeze. Typhoid DPT TT Hepatitis B DT BCG Diluents Important facts- o All vaccines are usually stored for routine storage in the refrigerator ILR, i.e. at 2 to 8degC even OPV. o But OPV is stored in the freezer at -20 to -40degC, if required for prolonged storage. o Measles, mumps and rubella MMR can also be stored in the freezer i.e. freeze-dried. o Vaccines which must never be allowed to freeze are typhoid, DPT, TT, DT, BCG, hepatitis B and diluents. 