Vaccine which requires the most stringent conditions for storage
Among the vaccines, polio is the most sensitive to heat, requiring storage at minus 20 degree Celsius. Vaccines which must be stored in the vaccine compaments are polio and measles. The cold chain is a system of storage and transpo of vaccines at low temperature from the manufacturer to the actual vaccination site (refer pgno:109 park 23 rd edition)
DPT
OPV
BCG
TT
Epidemiology