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boooooooooo_cowboys t1_j505s4p wrote

Reply to comment by seanmorris in Is there any difference in efficacy when a vaccine is administered somewhere other than the upper arm (e.g. on the foot)? by MercurioLeCher

You’re not trying to get your vaccine into the muscle cells themselves. All the action happens in the draining lymph nodes.

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firstfrontiers t1_j5061lt wrote

To my understanding you're trying to get it absorbed into the bloodstream, which is why you aim for muscle which is highly vascular tissue

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yellow_edge t1_j509412 wrote

You don't want it in the bloodstream, and they're even supposed to check that they don't accidentally enter a vein by aspirating before administering the vaccine dose.

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OnTheClockShits t1_j509ujj wrote

That’s out of date practice. Some people may teach to aspirate but it’s unnecessary.

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