The major supporting detail in 'Ellis Island' lists specific diseases doctors checked for.
The major supporting detail from the text 'Ellis Island' is:
The diseases that examining doctors looked for were cholera, scalp and nail fungus, tuberculosis, insanity, epilepsy, mental impairments, and trachoma, a highly contagious eye infection that could lead to blindness.
This detail provides specific examples of the health conditions doctors at Ellis Island were checking for during their medical examinations.
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