At the beginning of the spread of the Spanish flu to the United States, St. Olaf went into voluntary quarantine in hopes of avoiding the epidemic, allowing students to leave campus only for emergencies once they had obtained a pass. The first cases on St. Olaf's campus occurred on November 11, 1918, and shortly thereafter the college hospital was filled to capacity. Ytterboe Hall was converted into a hospital for the sick once the temporary beds in Hoyme Chapel had filled. St. Olaf officially closed for the year on December 7, due to a rapid rise of influenza cases. Four students died from flu complications.