Wrong. Nurses pull back to make sure they are In a vein when placing an IV or drawing blood. The vaccine shots are done intramuscular. There are also shots done intradermally. Arteries are deep and hard to hit. I assume it’s incredibly painful to hit an artery because the needle will have to go at like a 45 degree angle or something and penetrate super
Deep. I can always see or feel the vein before I place an IV in or I don’t stick the needle in. With an artery you can’t see it , it’s so deep ….you need an ultrasound machine to find it.