I found the Kharaa antidote in the pengling cave, and I got the voice lines confirming it, but it never unlocked the blueprint for it and I can’t craft it. Is there a way around this, or am I missing something else?

I didn’t want to look up spoilers, but I couldn’t find the injectable vessel after I found the vaccine itself, so I looked it up and it said it unlocks after you find the antidote in the cave and you have to craft it.