In secrecy, Dr. Matulewicz tested it on a friend who was on special leave from a work camp in Germany. He desperately needed a way to avoid going back to face death in the work camp—and becoming just another number. He injected the man with the bacteria and sent a blood sample to the German laboratory. About a week later, the young doctors received a telegraph informing them their patient had Epidemic Typhus, which prohibited the man's return to the work camp. It worked.
Others were treated as well, creating fake epidemics. It is estimated that 8,000 people owe their lives to Dr. Lazowski. Read the story here.