Legionella is pretty common, but it takes a rarer combination of factors to turn it into a case of Legionnaire’s disease. You need 3 things: a water source with lots of legionella, a way to aerosolize it, and a person with a weak immune system to breathe it in. In New York it was badly treated cooling towers doing the…

I work in water treatment- apparently this case is my hill to die on/finally stop lurking.