When you’re splitting pens or when you have a vial, she said, you can choose how much you draw. “If you feel like you need to stay on a lower dose longer, you don’t have to go through ...

"Single-use vials don't contain preservatives," commented an oncologist. "Puncturing a vial, drawing out half the contents, and placing it back on the shelf for the next day is a recipe for ...

So for many vaccinators, “drawing up” and giving a vaccine from a multi-dose vial will be new. This too has rules. The vaccinator first needs to clean the top of the vial with an antiseptic swab.