CDC continues to work with state and local health departments, the World Health Organization (WHO), and other partners to investigate cases of severe acute respiratory syndrome (SARS). During November 1, 2002-April 30, 2003, a total of 5,663 SARS cases were reported to WHO from 26 countries, including the United States; 372 deaths (case-fatality proportion: 6.6%) have been reported. This report updates information on reported SARS cases among U.S. residents and provides an overview regarding CDC's issuance of travel alerts and advisories.