This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Principles of Immunization and Vaccination, Subject name: Social & Preventive Medicine
Measles stored at PHC at what temperature? 
Select and explain. 
A. 0degC, B. 2-8degC, C. 20degC, D. Room temperature
B: 2-8degC
Answer: B: 2-8degC 
Explanation: ANSWER: (B) 2-8degCREF: APPENDIX-46 below TYPES OF VACCINE & IMMUNIZATION APPENDIX - 46Types of VaccineTypeContentExamplesKilled vaccineskilled, but previously virulent, microorganisms that have been destroyed with chemicals or heat.Avian Flu vaccine; developed by Reverse Genetics techniques. Reverse genetics' is an approach to discovering the function of a gene by analyzing the phenotypic effects of specific gene sequences obtained by DNA sequencing. This investigative process proceeds in the opposite direction of so- called forward genetic screens of classical genetics. Simply put, while forward genetics seeks to find the genetic basis of a phenotype or trait, reverse genetics seeks to find what phenotypes arise as a result of particular genes.