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It began as normally as a plane flight could during a pandemic.

United Airlines Flight 591, carrying 164 people, took off from Orlando, Fla., on Dec. 14 for a routine 5½-hour ride to Los Angeles.

But as the plane glided over Louisiana, a passenger felt short of breath. Soon, 69-year-old Los Angeles resident Isaias Hernandez was lying in the aisle, unresponsive.

Flight attendants put a call over the intercom, asking whether any doctors or nurses were on board.

Read the full story on LATimes.com.