Legionnaires' Disease - How Do People Get It?

The germ which causes Legionnaires' disease is a bacterium called Legionella pneumophila.

People catch Legionnaires' disease by inhaling small droplets of water suspended in the air which contain the legionella bacterium.

However, most people who are exposed to Legionella do not become ill.

Legionnaires' disease does not spread from person to person.

Updated 13.1.04 - Parts of this document © Crown Copyright - originally produced and published by the UK's Health & Safety Executive.

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