Santa Clara County reported 17 new cases, bringing the total in the county to 91.[199] San Francisco reported five new cases, bringing the total to 28,[2] and issued an order forbidding visitors to hospitals.[201] Two additional cases of coronavirus have been confirmed in Marin County, bringing the total number to five. The two new cases had no known exposure to other cases, and are believed to be a result of community spread — the first in the county. The two people are quarantined at home and will remain in quarantine until they are no longer infected.[202] A U.C. Berkeley graduate student has tested positive for the novel coronavirus.