Dr. saw a young man who appeared to have syphilis. Since it was considered
contagious with simple contact, he told man to leave boarding house. Pt. didn't. Dr. told
landlady about pt's. Syphilis. She threw pt. out, he sued Dr. NE Sup. Ct. ruled "the
private privilege ends where the public peril begins."
Dr. had a professional obligation to protect the public. See Tarasoff.