The Centers for Disease Control and Prevention (CDC) has reinstated a travel alert for Toronto, Canada, because of reports of new possible cases of Severe Acute Respiratory Syndrome (SARS).

CDC lifted the travel alert on May 20, 2003, because more than 30 days (or three SARS incubation periods) had elapsed since the date of onset of symptoms for the last reported case. However, on May 22, Canadian health officials reported a cluster of five new probable SARS cases, which led to today’s reinstatement of CDC’s travel alert for Toronto.