“I trusted that an immunity bubble was a ‘real thing,’” Mr. Diamandis said.
But two days after the studio production ended, he said, a member of his staff tested positive. He sent emails to inform attendees, urging them to isolate and get tested again.
On Friday, he wrote that at least 24 people had been infected. MIT Technology Review, which reported on the gathering last week, found that 32 people associated with the conference or more might have been infected.