There are always media frenzies over potential viruses and epidemics, but that doesn't necessarily mean there's no danger. There are always extreme precautions taken to ensure that people are kept as safe as possible for major events, and it's true all around. People tend to forget how much care and attention are devoted to keeping us safe every day.
Health officials are rightly worried about Zika, because it can have devesting effects on a fetus if the mother has zika while she is pregnant. But neither health officials or the media wer worried about Zika during the olypics because it was Brazi's winter. Instead it was a few athletes who worried about them.
Zika is real, and it's a threat. It's not just media hype, but it's not a run in terror kind of thing, but since most people who have Zika don't have symptoms, or have mild symptoms it's that much more difficult to identify. It seems to be less of a threat to adults who have the virus than to pregnant women who may contract it, since it causes birth defects.
No one caught Zika at the Olympics. This was due to two main factors : firstly that there was extensive coverage in the media, which meant that Olympic athletes were well aware of the problem and took the necessary precautions; secondly that the authorities in Rio took effective measures to reduce or eliminate the chances of being bitten by infected mosquitoes.