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Why do we get shots in the arm? It's all about the muscle

By Libby Richards, Associate Professor of Nursing, Purdue University

Millions have rolled up their sleeves for the COVID-19 vaccine, but why haven’t they rolled up their pants legs instead? Why do we get most shots in our arms?

As an associate professor of nursing with a background in public health, and as a mother of two curious kids, I field this question fairly often. So here’s the science behind why we get most vaccines in our arm.

It’s worth noting that most,…

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