An OPV vial shows this symbol on it. What does it indicate?
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
The vaccine has reached its expiry date
The vaccine has not been stored properly
The vaccine vial is empty
Use the vaccine if expiry date not reached
Immunization