Oh please. The very beginning of the anthrax attack was marked by recently departed douchebag Tommy Thompson's lame lines about how the victim was a hunter and drank from a stream etc. Of course the government was attempting to hush it all up.
If there was some wider release of anthrax, the odds that there were two widely separated victims with absolutely nothing in common is about as likely as firing a machinegun into a crowd and only hitting one person is the crowd and one person 20 miles downrange. It defies explanation. So, the answer must be: There were other victims that were undiagnosed or unreported.
Oh, yes, by all means, assume there's thousands more being covered up, and nobody reports their loved ones coughing up a lung because men in suits tell them to shut up.
And of course after 9/11 Americans are too cowed to speak up, and the press falls in line and salutes the flag in silence.
Nobody whispers a list of names on the Internet even after months, these victims just disappear, and nobody notices an empty desk, a car left parked, or little billy missing from the dinner table.
Lets also assume these terrorists managed to target only the homeless and friendless who could be conveniently shoveled under ground with nobody giving a damn. Very smart targeting. Lets take out the homeless. That will REALLY set America back on its heels. Its a blow from which they will never recover.
Oh, wait, there's Laci Peterson... I'm sure she was really an anthrax victim, and had to be done away with... And Drue Soudine, and that missing family in Tennessee, and what about that stack of bodies at the Crematorium...
That assumes, of course,there was a "plume". ( I've gotten a lot fonder of the plume in recent months.)