<prompt> Vaccine can be stored at PHC for:-2 day7 days15 days30 days  <response>: - Vaccine storage duration at PHC level is maximum of 1 month Storage of vaccines at different levels: STORAGE LEVEL STORAGE DEVICES DURATION OF STORAGE STATE REGIONAL LEVEL walk in cold rooms walk in freezer 3 months CHC DISTRICT LEVEL Large ILR Large deep freezer 1 month PHC Small ILR Small deep freezer 1 month SUBCENTER LEVEL Vaccine carriers 24-48hrs VILLAGE LEVEL Ice packs 2-4hrs 