Health Officials on Alert Over New Coronavirus

摘要

Public health experts are on edge about a new virus discovered in two patients, one of whom has died. The new infectious agent is a coronavirus, a group whose members include four viruses that cause the common cold as well as the agent that causes S ARS-a severe respiratory syndrome that killed more than 700 people and sickened more than 8000 in a global outbreak in 2002 and 2003.