And according to the health department, people who believe that it's difficult to contract the disease are probably right.
Infection requires prolonged and repeated contact.
Or, in the case of a confined plane, a flight that lasts more than eight hours. In Oregon, the number of tuberculosis cases is dropping. In 1998, Oregon counted 156 cases. As for Washington state, cases of tuberculosis have dropped from 265 in 1998 to 258 in 1999. But worldwide, tuberculosis kills more people than any other infectious disease.