Villa Duchesne and Oak Hill School will close Monday after administrators learned that a St. Louis County woman infected with the coronavirus is the older sister of a Villa Duchesne student. Moreover, a message from the schools to parents, circulating on social media, warns that the father and sister of the infected patient attended a school father-daughter dance Saturday night at the Ritz-Carlton in Clayton. They also apparently attended a pre-dance gathering at the house of a Villa student. St. Louis County Executive Sam Page said Sunday that the patient’s family had been told on Thursday to self quarantine at...