Question:
The ideal time gap between two live vaccinations is:
The ideal time gap between two live vaccinations is:
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Give them together, or separate by at least a month.
Updated On: Jun 24, 2026
- 2 weeks
- 4 weeks
- 8 weeks
- 12 weeks
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The Correct Option is B
Solution and Explanation
Step 1: Two live vaccines can be given on the same day at the same visit without any problem.
Step 2: However, if two live parenteral vaccines (such as MMR, MMRV, varicella, zoster and yellow fever) or the live intranasal influenza vaccine are not given together, the first one can blunt the immune response to the second.
Step 3: To avoid this interference, they should be separated by an interval of at least 4 weeks.
Step 4: Therefore the ideal minimum gap between two live vaccines given on different days is 4 weeks (option B).
Step 2: However, if two live parenteral vaccines (such as MMR, MMRV, varicella, zoster and yellow fever) or the live intranasal influenza vaccine are not given together, the first one can blunt the immune response to the second.
Step 3: To avoid this interference, they should be separated by an interval of at least 4 weeks.
Step 4: Therefore the ideal minimum gap between two live vaccines given on different days is 4 weeks (option B).
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