The total number of deaths in the first five months of 1945 was almost half the total deaths in the 12-year history of the camp. The death rate in the other Nazi concentration camps also rose dramatically in the last months of the war, as the typhus epidemic spread throughout Germany. American POWs in German camps were saved from the epidemic by booster shots of typhus vaccine sent to them from America by the International Red Cross. The Germans were conducting experiments at the Buchenwald camp in an effort to develop a vaccine for typhus, but had not been successful. After the war, the doctors who had attempted to develop a typhus vaccine at Buchenwald were put on trial as war criminals at Nuremberg in the Doctor's Trial conducted by Americans.
Bergen-Belsen [ˈbɛʁɡn̩.bɛlsn̩], or Belsen, was a Nazi concentration camp in what is today Lower Saxony in northern Germany, southwest of the town of Bergen near Celle. Originally established as a prisoner of war camp, in 1943, parts of it became a concentration camp. Initially this was an "exchange camp", where Jewish hostages were held with the intention of exchanging them for German prisoners of war held overseas. The camp was later expanded to accommodate Jews from other concentration camps.