Question

Which of the following is NOT true about vaccines?

• A. Two live vaccines can be given at the same time at different sites
• B. Two live vaccines at the same site should be given at least 3 weeks apart
• C. In a vaccine vial monitor, if the colour of the inner square is the same as the outer background, the vaccine is good for use
• D. Live and killed vaccines can be given together

Hint:

On a VVM, the vial is usable only while the inner square stays lighter than the ring.

Answer 1

The Correct Option is C

Step 1: The question asks for the false statement. A vaccine vial monitor (VVM) is a colour label put on vaccine bottles to show cumulative heat exposure. It has a deep blue outer circle with a white inner square.

Step 2: The inner square gradually turns blue as the vaccine is exposed to higher temperatures. When the inner square becomes as dark as the surrounding circle, that means the vaccine has had too much heat and must be discarded. So matching colour means the vaccine is BAD, not good. Option c is therefore false and is the answer.

Step 3: The other options are correct rules of vaccine administration. Two live vaccines can be given on the same day at different sites (option a is true). If not given together, two live vaccines should be spaced at least 3 to 4 weeks apart (option b is true). Live and killed vaccines can be given together (option d is true).

Step 4: Hence the statement that does not hold is option c.