I just got a flu shot today and was wondering how moving your arm around helps the flu shot. I’m well aware that flu shots contain a saline solution, but where does the solution go, and how does moving your arm affect it.
In: Biology
The saline solution goes into your circulatory system, distributed around the body, and gets peed out later just as if you’d drank water or ate salt.
Moving your arm around increases blood flow through the area, getting vaccine and the saline distributed into your circulatory system, and the increased blood flow also helps healing.
It also just hurts ‘cus you’re poking directly into into muscle.
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