[pgkdan]

Isolated cases happen every year, and we were due for one.

Bull...the CDC says there have been 18 reported cases in the 20th century. Not exactly something that happens every day.

[Rome2000]

"Inhalational anthrax generally occurs after an incubation period of 1 to 6 days"

ibid:Brachman PS, Friedlander AM. Anthrax. In: Plotkin & Mortimer, editors. Vaccines. Philadelphia (PA): W.B. Saunders; 1994. p. 730.