Where should vaccines be stored in a refrigerator?

• A. On door shelves.
• B. In the middle of the fridge, not on door shelves.
• C. In the crisper drawer.
• D. At the back of the fridge.

Answer: (B)

Maintaining a consistent cold temperature (typically 2–8°C) is essential for vaccine potency. The door of a refrigerator fluctuates a lot in temperature every time it’s opened, so placing vaccines there subjects them to temperature swings that can push them outside the safe range. The middle of the fridge stays the most stable, away from warm air rushing in from the door and away from any potential cold spots near the back or near shelves that aren’t as well circulated. That stability helps protect vaccines from degradation and ensures they remain effective.