Warsaw Ghetto hunger study

The Warsaw Ghetto Hunger Study was a study taken up by Jewish doctors imprisoned in the Warsaw Ghetto in 1942. The Nazis, intent on starving the ghetto within months, allowed no more than a daily intake of 180 calories per prisoner – less than 10% of the recommended energy intake for a healthy human being – while withholding vaccines and medicine that would be necessary to prevent the spread of disease in the dense ghetto.

Source: Wikipedia — Warsaw Ghetto hunger study (CC BY-SA 4.0)