How Risky Are Concerts? We Asked an Infectious Disease Expert

For a year and a half during the pandemic, concerts seemed more dangerous than just about any other setting. Then came vaccines, and shows trickled back, from Madison Square Garden to Red Rocks Amphitheatre — until the fast-spreading delta variant ripped through a Netherlands festival, leading to 1,000 infections, and the Foo Fighters postponed a show after a member of the band’s organization tested positive. Then Chicago public-health officials reported just