Question:medium
Which of the following is NOT true about vaccines?
Which of the following is NOT true about vaccines?
Show Hint
On a VVM, the vial is usable only while the inner square stays lighter than the ring.
Updated On: Jun 24, 2026
- Two live vaccines can be given at the same time at different sites
- Two live vaccines at the same site should be given at least 3 weeks apart
- 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
- Live and killed vaccines can be given together
Show Solution
The Correct Option is C
Solution and Explanation
Step 1: We need the single incorrect statement. Focus first on the vaccine vial monitor, a temperature-sensitive sticker introduced to the Pulse Polio Immunisation programme to flag heat-spoiled vials.
Step 2: Its design is a dark blue ring enclosing a lighter inner square. Heat makes the inner square darken progressively. The usable end-point is the opposite of what option c claims: the vial is fit only while the inner square stays LIGHTER than the ring. Once the inner square matches the ring, the vaccine is spoiled and rejected. That makes option c the false statement.
Step 3: Cross-checking the remaining choices confirms they are standard immunisation practice. Different anatomical sites allow two live vaccines simultaneously; a gap of about 4 weeks is needed if they are not co-administered; and inactivated vaccines may freely accompany live ones.
Step 4: Only option c contradicts accepted guidance.
\[\boxed{\text{VVM: matching inner square means the vaccine is spoiled, so the statement is false}}\]
Step 2: Its design is a dark blue ring enclosing a lighter inner square. Heat makes the inner square darken progressively. The usable end-point is the opposite of what option c claims: the vial is fit only while the inner square stays LIGHTER than the ring. Once the inner square matches the ring, the vaccine is spoiled and rejected. That makes option c the false statement.
Step 3: Cross-checking the remaining choices confirms they are standard immunisation practice. Different anatomical sites allow two live vaccines simultaneously; a gap of about 4 weeks is needed if they are not co-administered; and inactivated vaccines may freely accompany live ones.
Step 4: Only option c contradicts accepted guidance.
\[\boxed{\text{VVM: matching inner square means the vaccine is spoiled, so the statement is false}}\]
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