Despite its computer systems being infected with malware since Monday, MedStar Health, which operates 10 hospitals and more than 250 outpatient facilities in and around Washington, D.C., has continued to provide patient care at near normal levels, according to several updates released this week. Since the malware attack occurred, MedStar Health has treated an average of 3,380 patients a day at its 10 facilities, it announced Thursday. It has treated nearly 4,000 patients in its ERs and performed more than 1,000 surgeries.