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Unit 731

The key purpose of Ping Fan was the development of biological weapons. From the start, this included deadly experiments with humans, to test all kinds of pathogens and any newly developed delivery system. But in addition to the biowarfare experiments, humans were also experimented to death for other purposes, for basic research on new viruses or on frostbite, for example (see "the Songo case" below).

 

While Unit 731 was extremely careful to keep the human experimentation a total secret in China, many microbiologists in Japan knew about the human experiments. Some results were even published in the scientific literature, where humans used in experiments were referred to "Manchurian monkeys"– a rather simple code, as real animal experiments were labeled with the animal’s proper scientific name.

 

In Ping Fan, prisoners were used at times for more than one experiment, as long as they survived. Unit 100 in Changshun was scientifically more rigorous and killed all human subjects after an experiment. Today, this is standard procedure for animal tests, because any experiment may have an effect on the test subject and may thus influence the results of a later experiment.

 

After the experiments, victims were autopsied. According to Japanese eyewitnesses, some of them were cut open alive, to avoid the rapid deterioration of sensitive organs which could have falsified results. The following examples for human tests are from Sheldon Harris’ book Factories of Death:

 

* Pathogens were injected into victims to determine the minimal dose to cause a disease.

 

* Bombs filled with plague, anthrax or typhus were exploded near prisoners who were fastened to stakes in the ground.

 

* Foodstuffs (chocolate, cookies, beer, milk, coffee) were contaminated with pathogens and given to prisoners to determine what types of pathogens in what concentrations could be used for this delivery mechanism.

 

* A newly developed type of cholera vaccine was tested by vaccinating prisoners with different types of vaccines and infecting them some time later with cholera.

 

* Prisoners were exposed to extreme cold until their arms or legs were deep frozen, to test different techniques to treat frostbite. Based on experiments in Ping Fan, the Japanese army introduced a new standard method for frostbite-treatment.

 

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Uploaded on January 13, 2011
Taken on September 23, 2010