Around here the buses are usually full of the people the cops wont let congregate on street corners that also seem to have most of the communicable diseases in the book.

Last time my girlfriend and I were on one we both wound up with upper respiratory infections and I got a rash on my arm where it touched the person sitting next to me. (she and I were unable to get seats next to each other so it wasn't here, she's also got a touch of claustrophobia which didn't help matters any, she usually tries to get a seat in the front, all the windows help but this time the only seat available were towards the back.)

And the fumes coming from the engine were a spring breeze compared to the funk the filled the passenger compartment.

Let's just say I've never had a pleasant experience taking the bus so I avoid it like the plague it is.