21.   Most were linked to contaminated letters sent to U.S. media outlets and politicians.

22.   Most of the infections have been linked to contaminated letters sent to U.S. media outlets and politicians.

23.   Nevada officials say four people who may have come into contact with a contaminated letter at a Microsoft office tested negative for anthrax.

24.   The contaminated letter was postmarked from Trenton, New Jersey, as was the one sent to Majority Leader Tom Daschle, and contains similar handwriting, investigators said.

25.   The postal worker may have handled contaminated letters, the acting New Jersey governor says.

26.   They also are checking whether there could have been other, as-yet undiscovered contaminated letters sent to Washington.

27.   This meant it was the first contaminated letter received at a U.S. diplomatic post abroad that had not come in a diploamtic pouch from the United States.

28.   Thompson warned, however, that there may be more contaminated letters and more cases of anthrax.

29.   Four contaminated letters bearing Trenton postmarks were sent to members of Congress and the news media.

30.   Only four contaminated letters were ever discovered, but investigators believe at least two more have yet to be found.