Athletes have already been strategizing to protect themselves. Some will try to build up immunity by arriving early, while others plan to avoid the water until just before competition in the hopes that the symptoms won't kick in until after the Games are over (the incubation period for viruses can last up to 10 days) via wired
What I don't understand is, why did the Olympic Council allow Rio to host the Games? And why do athletes participate and risk their health?
The only thing I can think of is that the sportsmen are treating this as a challenge. The challenge of a non-safe environment and how do you win by overcoming these circumstances. If this is the case, then looks like being dumb prevails against common sense.