Wirths was promoted to SS-
Hauptsturmführer (captain) and appointed as chief camp physician at Auschwitz in September, 1942. He was appointed on the basis of his reputation as a competent doctor and committed Nazi who would be capable of stopping the
typhus epidemics that had increasingly affected SS personnel at Auschwitz. Wirths was a profound anti-Semite. At Auschwitz, Wirths was known to be protective of "Aryan" prisoner doctors and other prisoners, such as
Hermann Langbein,
Rudolf Höss, the commandant of Auschwitz between 1940 and December 1943, is said to have held Wirths in particularly high regard. He is said to have remarked of Wirths that "During my 10 years of service in concentration-camp affairs, I have never encountered a better one." In 1943 the impact on inmates of Wirths' actions at Auschwitz resulted in his receiving a Christmas card from
Hermann Langbein, a political prisoner who worked with him, which contained the message “In the past year you have saved here the lives of 93,000 people. We do not have the right to tell you our wishes. But we wish for ourselves that you stay here in the coming year.” It was signed: “One speaking for the prisoners of Auschwitz.” The figure of 93,000 was the difference in mortality rate among prisoners from typhus in the year prior to Wirths' arrival. In 1943–45, Wirths protected the Austrian nurse
Maria Stromberger against accusations by several SS men at Auschwitz, as Stromberger took charge of and contained the
typhus infections and, working for the Auschwitz resistance, saved many prisoners herself. However, Wirths was unaware of Stromberger's clandestine work for the resistance. After the war, Langbein called Wirths an "anständiger Nazi" E.W.J. Pearce, an associate professor of
Obstetrics and Gynecology at the
Truman Medical Center has made the following observation regarding Wirths' medical experiments: ". . . Wirths, without consent, photographed the cervices of women prisoners, then
amputated the pictured cervices, and sent both photographs and specimens for study to Dr. Hinselmann of Berlin". Hinselmann was the physician who developed
colposcopy.
Selection of prisoners Importantly, Wirths also asserted medical control of prisoner selections at the Auschwitz-
Birkenau camp, which, prior to spring 1943, had been conducted by the camp commander and his subordinates. Wirths insisted upon taking his own personal turn in performing selections, which he could have deferred to physician subordinates. Witness testimony given at the Trial of
Adolf Eichmann provided a useful insight into how the SS approached the issue of how to record the deaths of Auschwitz prisoners (this did not include those who had been immediately selected for gassing – their admission was simply not recorded in the death registers). Those who died while imprisoned at Auschwitz were always recorded as having died from natural causes and never from being executed or murdered. Wirths was promoted to SS-
Sturmbannführer (major) in September 1944. Following the evacuation of Auschwitz in January 1945 he was transferred, along with many other former Auschwitz personnel, to the
Mittelbau-Dora concentration camp in
Thuringia. Wirths again held the post of chief camp physician until Mittelbau-Dora's evacuation in April 1945. == Capture and suicide ==