Viral Swing: Revved by Sturgis Rally, COVID-19 infections move fast, far

The hundreds of thousands of bikers who attended the Sturgis Motorcycle Rally may have departed western South Dakota, but public health departments in multiple states are trying to measure how much and how quickly the coronavirus spread in bars, tattoo shops and gatherings before people traveled home to nearly every state in the country. From the city of Sturgis, which is conducting mass testing for its roughly 7,000 residents, to health departments in at least six states, health officials are trying to track outbreaks from the 10-day rally which ended on Aug. 16. An analysis of anonymous cell phone data from Camber Systems, a firm that aggregates cell phone activity for health researchers, found that 61% of all the counties in the U.S. have been visited by someone who attended Sturgis, creating a travel hub that was comparable to a major U.S. city.