I recently started working in a pediatric office where today I gave a rocephin injection IM. We don't normally aspirate with vaccines but with rocephin we do. Since I don't aspirate much, because we do vaccines more, I'm a little concerned about an incident today. When giving a rocephin today to a 9 month old I aspirated, no blood return but what looked like an air bubble formed. I proceeded to inject the medication and then went on the rest of my day not thinking much about it til now. Was that incorrect to inject the air bubble? Will it harm the patient? Still learning :)! Thank you!