There were no booties to wear over their shoes, and they wore scrub caps on their heads only if they were going to scrub in for a procedure. When you scrubbed in for surgery you couldn't touch anything after you finished scrubbing.
2008 August 18, Lee G. Bolman; Terrence E. Deal, Reframing Organizations: Artistry, Choice and Leadership, Fourth Edition edition, San Francisco: Jossey-Bass, ISBN 9780787987992, OL16886877M, pages 99:
Members of the transplant team scrub in and go about their respective duties.
When we were assigned to a surgical patient, we were expected to “scrub in” on his or her patients’ surgery when it occurred. […] To “scrub in” on a case meant one was to be part of the operating team, which might consist of one or two advanced residents and a second year resident or intern or two.