11.   Dozens of other people have either been exposed to anthrax, have actually come down with the milder skin type of the disease or may have anthrax.

12.   Doctors learned he had anthrax only when they examined his blood and saw the characteristic boxcar-shaped anthrax bacteria.

13.   For his part, Tsonas said he believed that the hijackers probably did have anthrax.

14.   For his part, Tsonas said he believes the hijackers probably did have anthrax.

15.   He does not have anthrax.

16.   Health officials said two other Brentwood workers also had pulmonary anthrax and were in serious condition.

17.   If he does not have anthrax, his doctors say, they are at a loss as to what had made him sick.

18.   If subsequent tests confirm that Lundgren has inhalation anthrax, the case will be treated as a criminal act, officials said.

19.   If the hijackers did have anthrax, they would probably have needed an accomplice to mail the tainted letters, said bioterrorism experts knowledgeable about the case.

20.   If the hijackers did have anthrax, they probably would have needed an accomplice to mail the tainted letters, according to bioterrorism experts knowledgeable about the case.