Lollapalooza festival was a “super spreader” event.Lollapalooza was the first major festival to return in the US since COVID-19 restrictions were lifted, and saw an estimate 385,000 people head to Chicago’s Grant Park between July 29-August 1.Festival founder Perry Farrell said last week that the festival “did the right thing” by returning in 2021 despite fears about the ongoing pandemic.Dr.