A prominent Chicago infectious diseases expert is warning that “lots of people” will contract COVID-19 at Lollapalooza this weekend, but Mayor Lori Lightfoot dismissed criticisms as coming from “critics on the sidelines,” and says that her health team says it is safe to proceed with the festival. Connect with NBC 5 Chicago Online Visit nbcchicago.com : https://www.nbcchicago.com/ Facebook: https://www.facebook.com/nbcchicago/ Twitter: https://twitter.com/nbcchicago Instagram: https://www.instagram.com/nbcchicago/