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NYC Legionnaires' disease outbreak 2026

One page that accretes the verified record as the story develops. Every fact keeps its date and its sources.

1 DAYS

22 FACTS

2 EVENTS

3 SOURCES

FIRST ENTRY JUL 22

JUL 22 · Day 1

JUL 22

Legionnaires' disease is a type of pneumonia typically spread by tiny water droplets containing Legionella bacteria.

JUL 22

Legionella bacteria grows best in warm water between 77°F and 113°F.

JUL 22

As of July 21, there have been five deaths and 82 diagnoses linked to the Upper East Side outbreak.

JUL 19 · Day -2

JUL 19

The outbreak prompted cleanup efforts at the Metropolitan Museum of Art and Guggenheim Museum.

JUL 19

NYC Health Commissioner Dr. Alister F. Martin announced the death on Sunday.

JUL 19

Eight people remain in the hospital as of Sunday night.