The WikiLeaks founder is being held in Belmarsh Prison awaiting a hearing on February 24 which could see him extradited to the US.
In a 1,200-word letter published in the medical journal The Lancet, the Doctors For Assange group expresses concern over his fitness for the legal proceedings.
The letter states that Assange is in a “dire state” of health due to the effects of “prolonged psychological torture” in both the Ecuadorian embassy and Belmarsh, where he has been detained.
“Should Assange die in a UK prison, as the UN Special Rapporteur on Torture (Nils Melzer) has warned, he will have effectively been tortured to death,” the letter added.
“Much of that torture will have taken place in a prison medical ward, on doctors’ watch. The medical profession cannot afford to stand silently by, on the wrong side of torture and the wrong side of history, while such a travesty unfolds.”
The first hearing into the United States’ request for Assange’s extradition was held on May 2 2019.
When asked by the judge if he consented to the extradition, Assange said: “I do not wish to surrender myself for extradition for doing journalism that has won many, many awards and protected many people.”
A copy of the Doctors For Assange letter has been sent to the Australian minister for foreign affairs, Marise Payne.