After reconstitution, the vaccine must be stored in the dark at 2-8 degree C and used within: September 2004: (A) 1 hour, (B) 2 hours, (C) 3 hours, (D) 6 hours
Answer is D. Ans. D i.e. 6 hour Reconstituted measles vaccine loses about 50% of its potency after 1 hour at 20 degree C; it loses almost all potency after 1 hour at 37 degree C.