Add to ORKG• “. . . citizens are generally observing the ban cheerfully as a patriotic duty.”• University of Minnesota Board of Regents yesterday postponed the opening of civilian classes until the influenza epidemic had passed• Commissioner Guilford reported there are at least 2,000 cases of flu in the city• Doctors at Mayo Clinic in Rochester, MN, observing effects of a new serum against flu and pneumonia• Schools of medicine, dentistry, and pharmacy at the University will admit students provided they subject themselves to university health service regulations• Dr. Beard, assistant dean of medical college, expounds on the benefits of fresh air: “Work in a cool, constantly ventilated department. Walk rather than ride. . . Sleep as nearly as possible...