I was in a course for 2 days, small room, 4 people, 1 was very sick (cold or flu, and not respecting good practices like coughing in elbow). 

I tried to take every precaution I know: wash hands frequently, eat my food outside the room, done my flu jab previously etc. I still got sick one day after, which made me skip work for 1 week and made 2 weeks of my life terrible.

I wanted at first to leave the course and go back to my work (which would have been the right decision in hindsight). But then I thought that my company **paid for this course** so I must be here. 

In a company that is fairly big and health conscious: is it acceptable to skip courses or meetings because a person in the room is sick? So if my manager asks me why am I not in X place, I reply with "there was a sick person in a room and I didn't want to get sick myself".