A new study by the IZA Institute of Labor Economics has linked the Sturgis Motorcycle Rally in Sturgis, S.D. to over 250,000 coronavirus cases in the U.S. The event was held from Aug. 7 through Aug. 16 and was attended by over 400,000 people from states across the country. According to Yahoo! News, “few wore facial coverings or practiced social distancing” during the rally. The report dubbed it a “superspreading event.”

The study also estimated that the event led to an estimated $12.2 billion in public health costs. According to The Hill, “that dollar amount is based on another estimation that an average of $46,000 is spent on each patient who tests positive for COVID-19.” According to Yahoo! News, “it is not clear if the study was subject to peer review.”

State officials, including Governor Kristi Noem (who has publicly expressed skepticism of the severity of the coronavirus pandemic), disputed the report. According to KOTA TV, Noem called the report “fiction,” while state epidemiologist Joshua Clayton said, “the results do not align with what we know.”

The band Smash Mouth performed at this year’s festival, with frontman Steve Harwell declaring, “Now we’re all here together tonight. And we’re being human once again. F*** that COVID s***,” before their performance.

For more information, head to Yahoo! News or The Hill.