51.   International passengers trains are not stopping at any station north of Ulan Bator and airlines have suspended their flights to infected areas.

52.   In Ulan Bator, authorities have closed all street and open markets and barred vehicles and pedestrians from infected areas of the city, Xinhua said.

53.   Foreign firms operating in India, near infected areas, have begun considering evacuation plans for expatriate workers.

54.   The spead of plague is often inadvertantly aided, as people who have themselves contrated the disease, but not yet develped symptoms, flee an infected area.