Communication between the Ghetto inhabitants and the outside world was completely cut off and the supply of food was severely limited, ensuring that many of the inhabitants of the Ghetto would slowly starve. Over the course of its existence, the population of the Ghetto swelled to 204,000 with more Jews from Central Europe being sent there. The Ghetto Administration remained in operation from April 1940 until the summer of 1944, but there were transports out of the Ghetto to German extermination camps (primarily Auschwitz and Chelmno).