11.   Q. What should Americans who have lived abroad, especially in England, do about possible exposure to mad cow disease?

12.   She said she also worried about the air quality, possible exposure to asbestos and the proximity to a potential terrorist target like the New York Stock Exchange.

13.   Tens of thousands of people are taking antibiotics as a precaution for possible exposure to anthrax.

14.   The anthrax vaccine has only been used as a preventive measure, never to treat people after possible exposure.

15.   The appeals court also raised questions about whether Santa Rosa had adequately warned Balderas and Garcia of their possible exposure to HIV.

16.   The dentist said he only would fill a cavity in a hospital, where he could take extra precautions against possible exposure to blood.

17.   The problem was that his saliva test had indicated possible exposure to human immunodeficiency virus, which causes acquired immune deficiency syndrome.

18.   The Pentagon is sending all of them a letter alerting them to the possible exposure.

19.   The use of anthrax vaccine as a treatment after possible exposure is experimental and those who choose to take it will be advised of the risks, Thompson said.

20.   Those possible exposure routes should be investigated in further phases of the study, said Brody.