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One morning, our refrigerator temperature monitoring device registered 32°F. The vaccine didn’t look frozen so we kept using it. Was this okay?

No. You should not use it until you know more. If you find that a vaccine has been exposed to an inappropriate temperature, try to determine the reason for the temperature excursion, mark the vaccine “Do Not Use,” and contact the manufacturer or the state or local health department to determine if the vaccine may be used without concern that its effectiveness has been diminished.

Do not leave vaccines in a storage unit that does not maintain temperatures within the recommended range. If you are unable to stabilize the temperature in your unit within the required range, or temperatures in the unit are consistently at the extreme high or low end of the range, identify an alternative unit with appropriate temperatures and sufficient storage space until the primary unit can be repaired or replaced.

Last reviewed: July 26, 2023

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