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Live vaccines are sensitive to heat. MMRV, varicella, and zoster. vaccines must be stored in a continuously frozen state in a freezer at. 5Â°F (-15Â°C) or colder until administration. MMRV, varicella, and. Live vaccines are. sensitive to heat. zoster vaccines deteriorate rapidly after they are removed from the freezer.
Vaccines and Aborted Fetal Tissue. The initial experiments of the MMR vaccine involved growing rubella in a cell culture utilizing fibroblasts from the lungs of an aborted caucasian female fetus. Scientists found that the virus, among other viruses, grew well in the cell culture (termed WI-38).