Find out why the Pfizer and Moderna COVID vaccines need to be kept so much colder than other vaccines.

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You might be wondering: if the vaccines degrade at warmer temperatures, won't they degrade when they get inside a warm human body? Answer: Yes, they will degrade, but not before doing their job. The idea behind cold chain storage is to make sure enough mRNA gets into you. So you basically put enough RNA into the syringe so that even with a little thermal degradation at 37, the vaccine still works!

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