Which of these vaccines are not covered under the open vial policy?
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Explanation: The measles vaccine does not follow the open vial policy. The open vial policy states that vaccine vials, once opened, can be used for multiple sessions over a period of up to 28 days, as long as they are kept under proper cold chain conditions to minimize vaccine wastage. This policy applies to all liquid vaccines, such as Hepatitis B , DPT, Pentavalent, OPV, IPV, PCV, and Td. However, reconstituted vaccines like MMR, BCG, JE , Yellow Fever, and Rotavirus vaccines do not follow the open vial policy.