Sticker shown on Vaccine ls indicate:-

- Sticker shown on Vaccine ls indicate maintainance of Cold chain - Vaccine Vial Monitor (VVM) Rules for VVM use in India: Rule 1: if inner square is lighter than the outer circle, the vaccine may be used Rule 2: If inner square is the same color as, or darker than the outer circle,vaccine must not be used. WHO Grade Outer Circle Inner Square Inference Grade I Blue White Vial can be used Grade II Blue Light blue Vial can be used Grade III Blue Blue Vial CANNOT be used Grade IV Blue Purple/Black Vial CANNOT be used