[RummyChick]

what happens if you didnt check the plunger and it hits a blood vessel and in goes the Moderna MRNA into the bloodstream...or for that matter any vaccine?

[David Chase]

A bruise and swelling.

The injection is intramuscular. Pulling back on the plunger may pull some blood out.....that’s normal. You just don’t want it in a vein or (although deeper) artery.

Really not a big deal. I’ve pushed emergency drugs without the plunger withdrawal.

An Epi Pen is self injecting and I.M. administered w/o a plunger withdrawal.

[RC one]

I don't know. Maybe nothing, maybe you're one of the people that has an adverse reaction to the vaccine. This isn't the same as typical IM medications though. I'm guessing it increases the likelihood of an adverse reaction but it doesn't guarant5ee it.

Most nurses have probably given thousands of IM injections and never pulled back blood. I am aware of it happening to a nurse one time as I said and so I know it can happen and so I always make it a habit to check. The chance is minimal though in the deltoid muscle. I'm being overly cautious I think.

It's interesting that you brought it up because I wanted to research this some more.