Jerome Hamon, the first man in the world to twice undergo a face transplant after flu tablets incompatible with his anti-rejection treatment led to the first attempt to fail, poses on April 13, 2018 at the Hopital Europeen Georges-Pompidou in Paris. / AFP PHOTO / Philippe LOPEZ

Jerome Hamon, the first man in the world to twice undergo a face transplant after flu tablets incompatible with his anti-rejection treatment led to the first attempt to fail, poses on April 13, 2018 at the Hopital Europeen Georges-Pompidou in Paris. / AFP PHOTO / Philippe LOPEZ

Jerome Hamon, the first man in the world to twice undergo a face transplant after flu tablets incompatible with his anti-rejection treatment led to the first attempt to fail, poses on April 13, 2018 at the Hopital Europeen Georges-Pompidou in Paris. / AFP PHOTO / Philippe LOPEZ

French medicine professor Laurent Lantieri (R), a specialist in hand and face transplant, poses with his patient Jerome Hamon on April 13, 2018 at the Hopital Europeen Georges-Pompidou in Paris. Hamon is the first man in the world to twice undergo a face transplant after flu tablets incompatible with his anti-rejection treatment led to the first attempt to fail. / AFP PHOTO / Philippe LOPEZ

French medicine professor Laurent Lantieri (R), a specialist in hand and face transplant, poses with his patient Jerome Hamon on April 13, 2018 at the Hopital Europeen Georges-Pompidou in Paris. Hamon is the first man in the world to twice undergo a face transplant after flu tablets incompatible with his anti-rejection treatment led to the first attempt to fail. / AFP PHOTO / Philippe LOPEZ

French medicine professor Laurent Lantieri (R), a specialist in hand and face transplant, poses with his patient Jerome Hamon on April 13, 2018 at the Hopital Europeen Georges-Pompidou in Paris. Hamon is the first man in the world to twice undergo a face transplant after flu tablets incompatible with his anti-rejection treatment led to the first attempt to fail. / AFP PHOTO / Philippe LOPEZ

French medicine professor Laurent Lantieri (R), a specialist in hand and face transplant, poses with his patient Jerome Hamon on April 13, 2018 at the Hopital Europeen Georges-Pompidou in Paris. Hamon is the first man in the world to twice undergo a face transplant after flu tablets incompatible with his anti-rejection treatment led to the first attempt to fail. / AFP PHOTO / Philippe LOPEZ

French medicine professor Laurent Lantieri, a specialist in hand and face transplant, poses next to a screen showing different steps of his patient Jerome Hamon's surgery on April 13, 2018 at the Hopital Europeen Georges-Pompidou in Paris. Hamon is the first man in the world to twice undergo a face transplant after flu tablets incompatible with his anti-rejection treatment led to the first attempt to fail. / AFP PHOTO / Philippe LOPEZ

French medicine professor Laurent Lantieri (R), a specialist in hand and face transplant, poses with members of his team and his patient Jerome Hamon on April 13, 2018 at the Hopital Europeen Georges-Pompidou in Paris. Hamon is the first man in the world to twice undergo a face transplant after flu tablets incompatible with his anti-rejection treatment led to the first attempt to fail. / AFP PHOTO / Philippe LOPEZ

EDITORS NOTE: Graphic content / A handout photo released by the Hopital Europeen Georges-Pompidou AP-HP on April 16, 2018 shows the face transplant on Jerome Hamon, a patient suffering from neurofibromatosis type 1. Hamon is the first man in the world to twice undergo a face transplant after flu tablets incompatible with his anti-rejection treatment led to the first attempt to fail. / AFP PHOTO / HEGP – AP-HP / - / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / Hopital Europeen Georges-Pompidou AP-HP" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS

EDITORS NOTE: Graphic content / A handout photo released by the Hopital Europeen Georges-Pompidou AP-HP on April 16, 2018 shows the face transplant on Jerome Hamon, a patient suffering from neurofibromatosis type 1. Hamon is the first man in the world to twice undergo a face transplant after flu tablets incompatible with his anti-rejection treatment led to the first attempt to fail. / AFP PHOTO / HEGP – AP-HP / - / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / Hopital Europeen Georges-Pompidou AP-HP" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS