A rose is a rose.... Is a dioxin a dioxin?

What are dioxins? Why the concern? ...published 12.12.04 in Medical News Today, a UK website. I was so quick to point out the news media are all reporting Mr. Yushchenko's dioxin poisoning, perhaps we should read a bit about dioxins. Nobody has yet defined exactly what kind of dioxin was found in his system, even though I read one article today that mentioned Russia once had considered using dioxin as a chemical warfare weapon. That article does not mention what kind of dioxin either, although we are perhaps all assuming the dioxin was the same as the chemicals used in Agent Orange during the war in Vietnam.