This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Reverse cold chain is for- 
Select and explain. 
A. Measles, B. Polio, C. Rubella, D. Peussis
B: Polio
Answer: B: Polio 
Explanation: Ans. is 'b' i.e., Polio "Reverse cold chain" is for transpo of ble poliovirus in stool to an investigation centre. To isolate polio virus from stool, the sample needs to be maintained at 4-8deg C or stored at - 20degC from the moment of collection, to processing in the laboratory. This process for maintaining the bility of polio virus is called 'Reverse cold chain'. o So, in reverse cold chain i) Temprature for transpoation --> + 2 to +8degC. ii) Temprature for storage --> -20degC. o Specific red vaccine carrier is used in reverse cold chain.