An OPV vial shows this symbol on it. What does it indicate?: (A) The vaccine has reached its expiry date, (B) The vaccine has not been stored properly, (C) The vaccine vial is empty, (D) Use the vaccine if expiry date not reached
Answer is D. d. Use the vaccine if expiry date not reachedThis is a vaccine vial monitor (VVM) showing white inner square & blue outer circle; VVM provides an indication of the cumulative heat to which the vial has been exposed