What Is Legionnaires Disease?
3. Legionnaires Disease Spread
Legionnaires is not contagious. It does not spread from person to person. Instead, it is spread most often through water. Once the bacteria is present throughout a water system, it can be present in microscopic drops of water that end up in the air. These droplets are small enough for a person to inhale them.
Occasionally, people get the disease when they aspirate water containing the bacteria, such as when water accidentally enters the lungs while drinking. There have been a few instances when a person contracted Legionnaires disease after working in the garden, but this is very rare.
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