31.   A similar disease is caused by Marburg virus, which also has no known cure or vaccine.

32.   AIDS, which has no known cure, is spread through human fluids, contaminated blood used in transfusion, infected blood products and syringes used by drugs abusers.

33.   AIDS, which has no known cure, attacks the immune system, leaving victims susceptible to other diseases.

34.   At the hospital, Mardel lectured doctors and nurses and showed them videos on treating victims of the virus, for which there is no known cure.

35.   Because there is no known cure, doctors usually focus on prevention and therapy to minimize damage.

36.   Ebola is a type of hemorrhagic fever for which there is no known cure.

37.   In the United States, major airports were on the lookout for travelers stricken with the disease, for which there is no known cure.

38.   No known cure was available.

39.   Scientists do not know where the virus comes from, and there is no known cure.