[aristeides]

The Hongkong health authorities are stumped by 92 cases reported in one day in a single apartment block in Kowloon, and are fearful it could mean the disease is air- or water-borne.

One report I read speculated that the disease might have spread in the apartment house because of poor plumbing: sputum from sick people ended up in other people's drinking water.

[Ronin]

All I know is that I am very careful on the trains of Tokyo these days. If a person looks the slightest ill, I will move to another car of get off the train.

Until I know more about it, this is too scary to play around with.