We’ve posted in the past about various Legionella outbreaks including the one in Chicago, the one in Edinborough, and of course the one in the Playboy Mansion. For some reason we didn’t talk about the recent lethal outbreak in Quebec. You can read about it here.
The latest update is that the source of Legionella was a rooftop cooling tower. These are common sources of Legionella and it sounds like in this care there were insufficient mitigation measures undertaken before the outbreak occurred.