General term for any of a number of cold or flu maladies that you get from riding San Francisco's crowded and poorly ventilated Muni Trains.
"Ugh... I think I'm coming down with Muni Malaria. I probably got it from the tiny Asian lady with no sense of personal-space who kept coughing on me on my commute yesterday morning. The garlic bagel she had for breakfast wasn't very appetizing while being sneezed into my face."
von Jeffrey Glover 5. November 2007