than 100,000 people during the Games.

"A very special day," tweeted Glenda Kozlowski, a former bodyboarding champion who is one of Globo TV's main sports anchors. (@glendakozlowski)

The countdown for the Rio Olympics ends on Friday with the opening ceremony at the Maracana Stadium. For those not able to be there, following the party on social media might be just as exciting.1916 New York City polio epidemic

The 1916 New York City polio epidemic was an epidemic of polio ultimately infecting several thousand people, and killing over two thousand, in New York City, primarily in the borough of Brooklyn. The epidemic was officially announced in June 1916, and a special field force was assembled under the authority of Dr. Simon R. Blatteis of the New York City Health Department's Bureau of Preventable Diseases, with broad authority to quarantine those infected with polio and institute hygiene measures thought to slow the transmission of the disease. Polio was a poorly understood disease in this era, and efforts to stem its spread consisted primarily of quarantines, the closure of public places, and the use of chemical disinfectants to cleanse areas where the disease