A PHC medical officer wants to give pulse polio immunization. The following finding in the Vaccine Vial Monitor (VVM) indicates that the vaccine should not be used:

asked 2016-05-11 03:36:02 -0500

Shreya gravatar image

a. Inner square is white, outer circle is blue

b. Inner square is blue but lighter than outer circle

c. Inner square matches the color of the outer circle

d. Inner square is lighter than outer circle

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