LAUSANNE, Switzerland — Colorful placards in the Olympic Park here, the home of the International Olympic Committee, detail cultural, architectural and environmental trivia about Brazil, the site of this summer’s Olympics. Introducing Rio de Janeiro as home to 41,000 plant species and the biggest urban rain forest in the world, the placards advertise “all you need to know about the Rio Games before you even get there.”
But some timely facts are missing: Brazil is in the midst of a deepening financial crisis. The country has also been hit hard by the Zika virus, an international outbreak that the World Health Organization last month declared a public health emergency.
On Wednesday, officials of the…