Why did starvation and typhus spread in the Warsaw Ghetto?

The starvation and typhus epidemic in the Warsaw Ghetto were direct consequences of the inhumane conditions imposed by the Nazi occupation.

The Nazis forced nearly half a million people into a confined 840-acre district, leading to extreme overcrowding where residents were packed at a rate of approximately nine people per room, with many others lacking any housing at all. This severe density, combined with the systematic deprivation of resources, created an environment where disease and malnutrition flourished, resulting in thousands of deaths every month. The deliberate containment of such a large population in a restricted, unsanitary space was a fundamental component of the Nazi policy of persecution that preceded the mass deportations to death camps.1