That's cheating if you are vaccinating the athletes. If your athletes are producing antibodies, you are doping your athletes with vaccines. Automatic disqualification!Original Post Deleted
For me the obscure sports include Equestrian (middle-aged folks in funny dress prancing around on horses?). Then there are the canoe/kayak sports (which looks kind of cool actually with a man-made water obstacle course) and now there is, I kid you not, sport climbing (I was like WTF when I saw that at first, but now I am like, ok, cool).