Isn't this old news? If you are a Vietnam vet who were exposed to Agent Orange or other herbicides, and you get Parkinson's, the VA assumes it was from Vietnam. My grandfather had Parkinson's a long time ago it was always said it was due to pesticides they used while farming.
First acknowledge AO death was in 2015, they gaslighted entire generations. Had Nixon not sent his campaign manager to Vietnam in 1969, and promised the VietCong a better deal later when he was president, we wouldn't have spent those five unneeded years there and wouldn't have used AO.
IIRC the issue with AO was the dioxins present as a side-product of the synthesis, not the herbicide itself. Dioxins are nasty.