11.   Public officials said they hope that applying the vaccine now will kill spores that may be lingering in the lungs despite the use of antibiotics.

12.   The heat kills the spores and then the wood is allowed to dry out.

13.   The irradiation process used to kill anthrax spores can affect a variety of mailed items.

14.   The U.S. Postal Service is pushing to install sterilization equipment designed to kill anthrax spores, he added.

15.   The various disinfectants and devices being used kill anthrax spores in different ways.

16.   Union officials have said they want all regional mail-sorting facilities to be equipped with machines that use electron beams to kill anthrax spores.

17.   Tests for other possible uses have shown that the chemicals kill spores on all surfaces, such as chairs, office papers and carpets.

18.   The Centers for Disease Control and Prevention said it was unlikely that all the spores will be killed.

19.   The Centers for Disease Control and Prevention said it was unlikely that all the spores would be killed.

20.   The Centers for Disease Control and Prevention said Friday it was unlikely that all the spores will be killed.