[TheBattman]

I can understand having field tests that are super-sensative. IT's generally better to err on the side of caution, than to risk life - BUT -

What other materials could possibly set off a false postive for ANTHRAX?

I do know that some chemical compounds can trigger false positivies for certain chemical agents, but a biological false negative?

[California74]

Check out the source link now. They are confirming that it is NOT ANTHRAX. It's baking soda.