51.   Production of an anthrax vaccine is on hold.

52.   Root said the only other plant in the world that produced anthrax vaccine was in Britain.

53.   Scientists hope to come up with a one-shot anthrax vaccine.

54.   Separately, the CDC has decided to issue anthrax vaccines for investigators and others at high risk of exposure to the bacterium, CNN reported Friday.

55.   Short-term protection from the anthrax vaccine requires three injections over four weeks, and a small number of workers received their first shot late last week.

56.   Six American experts on anthrax vaccines said the Russian vaccine was probably even more effective than the American vaccine in preventing the recipient from falling ill with anthrax.

57.   Some experts have recommended the use of anthrax vaccine in combination with antibiotics to treat the inhalation form of the disease.

58.   Some experts say the lack of a public stockpile of anthrax vaccine is looming as a potentially more serious gap in national preparedness against bioterrorism.

59.   The anthrax vaccine has been controversial because of past problems with the vaccine and its maker.

60.   The Army was testing an anthrax vaccine for humans and wanted to test its effectiveness on different, possibly stronger strains than they had on hand.