Which of the following statements about vaccine storage conditions is NOT correct?

Hariyana-CHO-2021

Community Health Nursing

Hard

Appeared in: Hariyana-CHO-2021

Explanation

The statement about Measles vaccine storage is incorrect because the required temperature depends on the level of the cold chain system.
While it can be stored long-term at -15°C to -25°C in walk-in freezers at national or state-level stores, it is kept at +2°C to +8°C in refrigerators at the peripheral/service level (e.g., Primary Health Centres).
The absolute phrase "at all levels" makes the statement factually wrong, as storage protocol differs for long-term bulk storage versus short-term storage before administration.

Option B: This is a correct statement. DPT-HepB is a freeze-sensitive vaccine containing an aluminum adjuvant.
Option C: This is a correct statement and a fundamental rule of the cold chain.
Option D: This is a correct statement. BCG is a live, freeze-dried vaccine that is stored at standard refrigeration temperatures.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Vaccine Storage and Cold Chain Management as background academic context rather than a clinical decision trigger.
Maintaining the cold chain is a critical nursing responsibility to ensure vaccine efficacy. A break in the cold chain can render vaccines useless, leading to failed immunization and leaving patients vulnerable to disease.
Nurses must check and record refrigerator temperatures at least twice daily to ensure they remain within the safe range of +2°C to +8°C.
The Vaccine Vial Monitor (VVM) on vaccines like Measles and DPT helps determine cumulative heat exposure, but it does not indicate if a freeze-sensitive vaccine has been frozen.

How to Approach the Question

First, recognize this is a negatively framed question asking for the 'NOT correct' statement. This means three options will be true, and one will be false.
Systematically evaluate each option based on your knowledge of vaccine cold chain principles.
Recall the two main temperature categories for vaccine storage: refrigerated (+2°C to +8°C) and frozen (-15°C to -25°C).
Differentiate between vaccines that are freeze-sensitive (e.g., DPT, HepB, TT) and those that are heat-sensitive but can be frozen for long-term storage (e.g., Measles, OPV).
Pay close attention to absolute terms like "at all levels". This is often a clue, as protocols can vary between central storage depots and local health centers.
By confirming that statements B, C, and D are standard, correct procedures, you can deduce that statement A must be the incorrect one.

Concept Tested & Keywords

Concept Tested: Vaccine Storage and Cold Chain Management
Stem keywords: vaccine storage, Measles, DPT-HEPB, Diluents, BCG
Lead-in keywords: NOT correct
Negative lead-in flag: This question uses negative framing ('NOT correct'). You must identify the single FALSE statement among the options.

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