Def some kind of test being done. The Olympic Games is a huge disease vector and more so for the Olympic Village and an STD, because those meatheads just fuck each other stupid then carry whatever they've caught back with them to all corners of the globe. And I think Zika has a weird dormancy phase too. Perfect test case for spreading the next great plague. Edit: Also the glyo cover up seems a good call too. My local parkland now puts up warning signs when they use it.