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
A flu shot is an intramuscular injection. This means you inject the medication directly into the deltoid muscle on your arm. Moving your arm around after the injection helps with absorption. It basically just mobilizes your arm which increases blood flow which increases the rate the medicine is absorbed and circulated.
Latest Answers