Recent news: The strange case of the toxic handshake

I have yet to read of any diagnosis of the three peoples’ “illness.” Was there any? (Although I guess because of privacy laws, that might not have been made public.)

http://www.cnn.com/2006/US/07/22/handshake.illness.ap/index.html

How odd. And the thing I want to know: Why did they get sick, but the accused did not? (Perhaps it was Iocain powder and he had spent years building up an immunity.)