Vaccine preventable diseases like polio, measles, and hepatitis are a major cause of morbidity and mortality among children .OPV may lose 4% to 13% of its potency per day at 25°C, 11% to 21% per day at 31°C, and 26% to 34% per day at 37°C.Studies done in our country for compliance is in the tune of 60-80%. Should I rely on this cold chain system for heat labile vaccines, particularly in the Government setting.