Preventative therapy?

Can you treat a patient before they have symptoms to prevent Legionnaires’ disease if you know that they may have been exposed (water supply where they stayed tested positive)?

Many buildings have Legionella in the drinking water, and you have undoubtedly been exposed to Legionella in the past. Most patients who contract Legionnaires’ disease have a risk factor. Cigarette smoking is the most common. Disease in which the immune system is compromised is another. If you develop high fever and symptoms of pneumonia (cough), see a physician.