Health
The latest news in medicine and wellness: From findings on heart disease, to facts about fitness, to breakthroughs on COVID-19.
Latest in Health
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COVID-19
How does an mRNA vaccine work?
![A woman rubs her neck with her fingers in front of a pink and blue background](https://www.popsci.com/wp-content/uploads/2021/01/13/CRSI6UKWARG2TL2PD4ITAFRZRU.jpg?w=675)
Fitness & Exercise