Harvard’s Office of Career Services estimates that 17% of any one of its classes will apply to med school - this is a huge fraction of the student body. Pre-med applicants with a GPA of 3.5 or higher had a 93% acceptance rate to med schools in 2013, whereas average acceptance rates that year were about 42%.
Harvard College offers a peer pre-med advising program, where students are assigned a pre-med tutor sophomore through senior year.
Harvard University hosts the country’s #1 ranked medical school, and also boasts very strong biological sciences departments. There are several affiliated teaching hospitals nearby (which are great for both research and clinical experience).