Anatoly Chubais, who quit his post as a Kremlin special envoy due to the war in Ukraine, is being treated in intensive care in Europe for a rare immune disorder that attacks the nervous system, two sources close to Chubais told Reuters.
Chubais, 67, thinks he is suffering from Guillain–Barre syndrome, a disease caused by the immune system damaging the peripheral nervous system, said the sources.
"He thinks it's a disease," the first source told Reuters on condition of anonymity.
"I don't think it is poisoning," said the second source, who also spoke on condition of anonymity.
(Editing by Guy Faulconbridge)