What is the best way to protect ourselves from Legionella pneumophila or just Legionella in general?
For patients who are in general good health, the best protection is to avoid cigarette smoking.
For patients who have an underlying disease that compromises their immune system (diabetes, kidney failure, etc.), avoid drinking tap water. Instead, bring the water to a boil, then cool it, and then store it in the refrigerator for drinking. Long boiling times are not necessary. As soon as the water starts boiling and bubbling, Legionella and other water bacteria are killed. Bottled water is less likely to contain Legionella in large numbers than tap water.
For patients who are transplant recipients, receiving cancer chemotherapy, or receiving corticosteroids (prednisone), tap water should not be used for drinking. Buildings taller than three stories are more likely to harbor Legionella.