What were the most common diseases on Ellis Island?

At Ellis Island, the most common diseases included tuberculosis, trachoma (an eye infection), and measles. These illnesses were prevalent among immigrants due to crowded living conditions and limited access to healthcare prior to their arrival. Health inspectors conducted examinations, and those found to be ill were often quarantined or denied entry to the United States. The goal was to prevent the spread of contagious diseases to the broader population.