When you get a shot, like a flu or COVID vaccination for example, they typically put it in your upper arm or your thigh. Are they just sort of injecting it into the muscle? Or into a vein? Either way, where does it *go*?
I have seen videos of when people get things like local anesthetic where the skin starts to balloon out where they put the liquid. Does that sort of thing happen just deeper in the body? I know our body is mostly liquid but does it just absorb? Maybe redistributed ?
In: Biology
For injections into a vein, it just goes directly into your bloodstream, but that’s not typically how vaccines are given. Vaccines are mostly given into muscle tissue, where the liquid just spreads out in the tissue and eventually is absorbed into the bloodstream. Some injections are also given subcutaneously (into the layer of fat just below the skin) where it forms a small bubble of liquid that’s absorbed into the bloodstream.
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