Why do some people have side effects with COVID-19 vaccines …
https://www.psu.edu/news/research/story/why-do-some-people-have-side-effects-covid-19-vaccines-while-others-do-not/
After getting the COVID-19 vaccine, some people develop a low-grade fever, fatigue, headache, and/or muscle aches, while others have no symptoms at all. According to Leslie Parent, vice dean for research and graduate studies in the Penn State College of Medicine, scientists do not fully understand why this is the case, but the differences could be due to a combination of a …
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