Chicago’s Department of Public Health is asking people who tested positive for COVID-19 after this year’s Market Days festival to reach out.

The CDPH request is part of a program compiling data on how coronavirus may spread to “learn more about large gatherings and other social gatherings that may have occurred before or after Market Days.” Market Days provides an interesting scenario to study viral transmission with its combination of indoor and outdoor events.

Founded in 1982, this year’s Market Days took place in Chicago’s Northalsted/Lakeview neighborhood over the weekend of August 6th through August 8th, combining live music and DJs in the streets and further celebrations in area bars and clubs after dark.

Organizers required all attendees to be vaccinated or masked, with free COVID rapid testing at the gates and a vaccination center on Halsted Street. In keeping with city and state guidelines, some businesses in Northalsted required proof of vaccination for entry.

CDPH spokespeople “did not directly answer questions about if the investigation was routine for events during the pandemic or if Market Days as being singled out,” according to Kelly Bauer at

Anyone who tested positive after Market Days is encouraged to fill out a case report form with the Chicago Department of Public Health.


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