Putin, Russia & the West TV - Facing Putin TV -
It soon became clear that [Viktor] Yushchenko was very ill. He was flown to a private clinic in Vienna where he was found to have been poisoned by a huge dose of dioxin. Putin, Russia and the West II: Democracy Threatens, BBC 2022
Three weeks later Yushchenko won the re-run decisively. ibid.
Washington received Yushchenko like a hero. ibid.
‘Mr Yushchenko’s condition was caused by dioxin poisoning.’ Facing Putin s1e4, doctor’s press conference, National Geographic 2016