Question:
Ideal temperature for DPT storage?
Ideal temperature for DPT storage?
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DPT is freeze-sensitive, so it stays in the refrigerator, not the freezer.
Updated On: Jun 24, 2026
- Room temperature
- 4 to 8 degree C
- 0 to -20 degree C
- None
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The Correct Option is B
Solution and Explanation
Step 1: DPT (diphtheria, pertussis, tetanus) is an adsorbed vaccine. Adsorbed vaccines must never be frozen, because freezing damages the antigen-adjuvant complex and causes loss of potency.
Step 2: The correct storage condition is refrigeration between 4 and 8 degree C, so option b is right.
Step 3: Room temperature (option a) is too warm and accelerates loss of potency. Sub-zero storage of 0 to -20 degree C (option c) is meant for highly heat-sensitive vaccines such as oral polio vaccine at the higher levels of the cold chain, but it would freeze and destroy DPT.
Step 2: The correct storage condition is refrigeration between 4 and 8 degree C, so option b is right.
Step 3: Room temperature (option a) is too warm and accelerates loss of potency. Sub-zero storage of 0 to -20 degree C (option c) is meant for highly heat-sensitive vaccines such as oral polio vaccine at the higher levels of the cold chain, but it would freeze and destroy DPT.
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