system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Reverse cold chain is used for
assistant
The correct answer is  The cold chain is a system of storage and transpo of vaccines at low temperatures from the manufacturer to the actual vaccination site. The cold chain system is necessary because vaccine failure may occur due to failure to store and transpo under strict temperature control (refer pgno:109 park 23 rd edition)