The threat of anthrax has many people taking extra precautions.
Responding to all the calls is taking a toll on the Tulsa Fire Department.
In a period during which they normally might have five calls - they're answering two dozen, many of them to check out suspicious items.
One school cafeteria worker called about a powder in the kitchen.
Even though it looked like flour - every precaution was taken - adding to the cost of checking out anthrax.
Captain Jerry Williams,Tulsa Fire Department: "I would probably think about $500 to $1000 per incident depending on how much we had to use to seal off an area, like St Johns was a pretty extensive seal off operation."
The suits and equipment that come into contact with the unknown are bagged until they're tested - and that usually takes weeks.