This article is from the Medical Education FAQ, by firstname.lastname@example.org (Eric P. Wilkinson, M.D.)with numerous contributions by others.
Absolutely not, but doing research does help to demonstrate
analytical skills in scientific investigation which are helpful for
practicing physicians. There are many medical students who have
never stepped inside a lab outside the prerequisite lab courses, but
at the same time, many people feel that with increased competition
for medical school seats, research experience is a much-needed notch
on the applicant's belt.