US does not provide any MBBS programmes like that of India. The candidates do a graduation in Biology and then apply for residency in Harvard. The residency is equivalent to MD/MS in India. For residency in USA, students need to give USMLE which is a three step examination. The highest scoring international students gets to choose the top one like John Hopkins, Harvard etc. Also you need to have a strong Cv with research background, and recommmendation letters.
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