I got a vial coming ashore which one of my villagers drank. I think it said he felt funny for a while but then nothing. However when I came to play the game again I'd gained level 2 of medicine. Not sure how I missed it but there are other people with Villages and they could have clicked off it. Can any one tell me if it was the vial? (Oh by the way I didn't buy it, didn't have nearly enough tech point.)