# 1976 Philadelphia legionellosis outbreak

> first occasion of a cluster of a pneumonia cases later identified as Legionnaires' disease

**Wikidata**: [Q4577273](https://www.wikidata.org/wiki/Q4577273)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/1976_Philadelphia_Legionnaires'_disease_outbreak)  
**Source**: https://4ort.xyz/entity/1976-philadelphia-legionellosis-outbreak