WARNING: Some of the following pictures are of a graphic nature. Viewer discretion is advised.

The world's first partial face transplant took place in France in 2005 and the first full face transplant was performed in Spain in 2010. The relatively new procedure is implemented by a surgical staff replacing part or all of a person's face with tissue from a cadaver. <br><br> Pictured: Jerome Hamon is the first person in the world to receive two facial transplants. Dr. Laurent Lantieri, who preformed the surgery sits behind the computer screen displaying the different stages in Hamon's surgeries, April 13, 2018, in Paris.

Jerome Hamon is the first person in the world to receive two facial transplants in Paris, April 13, 2018. Hamon had his first transplanted face removed last year after signs of rejection following a treatment with an incompatible antibiotic during a cold. The 43 year old remained in a hospital in Paris without a face for two months while a compatible donor was sought.

A timeline of Patrick Hardison's recovery after his transplant surgery is displayed on a screen during a press conference at New York University Langone Medical Center, Aug. 24, 2016, in New York.

Volunteer firefighter Patrick Hardison is pictured in New York, a year after receiving his face transplant, Aug. 22, 2016. He endured 71 operations over 12 years after a mobile home blaze melted his mask and burned his face. The groundbreaking face transplant, performed at NYU Langone Medical Center had a 50% chance of success.

University of Maryland Medical Center doctors explain the most extensive full face transplant completed to date performed on Richard Lee Norris, pictured at right, during a news conference, March 27, 2012 at the University of Maryland Medical Center in Baltimore.

Richard Norris speaks with Dr. Eduardo Rodriguez, who led the surgical team that performed Norris' face transplant after a shotgun blast ravaged the bottom half of Norris' face, at the University of Maryland Medical Center in Baltimore, June 18, 2013.<br><br>Norris said he lived as a recluse for over a decade after the 1997 accident that took away his chin, jaw, mouth, nose and tongue.

Carmen Tarleton is interviewed in her home in Thetford, Vt., Aug. 20, 2008. The Vermont woman who was burned and disfigured when her ex-husband doused her with industrial lye in 2007 was been approved for a face transplant at Brigham and Women's Hospital in Boston.

Carmen Blandin Tarleton, of Thetford, Vt., speaks with reporters at Brigham and Women's Hospital in Boston, May 1, 2013. The 44-year-old mother of two received her transplant in a 15-hour operation on Feb. 13. She told reporters that she will be "forever grateful" to the tissue donor who provided her with a new face.

Dallas Wiens gives an interview, Oct. 13, 2010. Wiens suffered life-threatening burns to his head when the boom lift he was operating near a church drifted into a nearby power line in 2008 and he became the first U.S. man to receive a full face transplant in 2011.

Dallas Wiens speaks at a press conference at Brigham and Women's Hospital in Boston, May 9, 2011. A team of more than 30 doctors, nurses and anesthesiologists worked for over 17 hours in March to give him a new face, complete with skin and the muscles and nerves needed to animate it.

Charla Nash, pictured on March 21, 2012, received a face transplant in 2010 after she was severely mauled by her employer's pet chimpanzee in 2009. The operation took 20 hours and a team of more than 30 doctor's and nurses. Nash was the third person to undergo a face transplant at Brigham and Women's Hospital.

Isabelle Dinoire who received the world's first partial face transplant, addresses a news conference at Amiens Hospital in Amiens, France, Feb. 6, 2006. Dinoire's nose and lips were bitten off by her own black Labrador and she received her transplant in November 2005, in a surgery that took 15 hours.

Isabelle Dinoire who received the world's first partial face transplant addresses a news conference at Amiens hospital in Amiens, France, Feb. 6, 2006. A statement released by Amiens-Picardie University Hospital announced her death in 2016.