Why is Eliezer edmitted to the hospital and what dangers face him there in the book Night?

Eliezer is admitted to the hospital in the book "Night" due to an infected foot. Dangers he faces in the hospital include the risk of being selected for the gas chamber, as the Nazis often targeted patients who seemed unfit for work. Additionally, the hospital environment is characterized by brutality and neglect, with little medical care provided to the patients.