A cold chain handler at a primary health centre needs to store BCG and measles vaccines. As per the Universal Immunization Programme guidelines, at which level of the cold chain should these diluent vials be stored?
- A On the top shelf of the ice-lined refrigerator at +2 to +8°C ✓
- B In the deep freezer at -20°C
- C In the cold chain carrier with conditioned ice packs
- D At room temperature away from direct sunlight
Correct answer: A. On the top shelf of the ice-lined refrigerator at +2 to +8°C
Explanation
Diluents for freeze-dried vaccines such as BCG and measles must be stored in the ILR at +2 to +8°C, never frozen. Freezing a diluent can cause glass cracking and contamination. Storing diluents at room temperature risks bacterial growth. The cold chain carrier is for transport only, not storage.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.