As a reminder, be sure to properly give content warnings and put sensitive subjects behind proper spoiler tags. It's for the mental health of not just your comrades, but yourself as well.
Here is a screenshot of where to find the spoiler button.
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there would be, the vials are sterilized and have self-healing holes on top where you put the needle in, so opening the vial will break the sterility. you would have to re-sterilize if you did this.