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VANCOUVER, BRITISH COLUMBIA - APRIL 4: Reporter Wendy Luo holds up a N95 mask manufactured by 3M, one of the only masks that guards against germs such as severe acute respiratory syndrome (SARS) April 4, 2003 in Vancouver, British Columbia, Canada. A SARS clinic opened at noon today at St. Vincent's Hospital in Vancouver, British Columbia, Canada. SARS is a flu-like illness which has killed at least 80 people, mostly in Asia, and more than 2,200 have been infected around the world. U.S. President George W. Bush listed the mystery virus as a communicable disease by executive order today. (Photo by Don MacKinnon/Getty Images)

VANCOUVER, BRITISH COLUMBIA - APRIL 4:  Reporter Wendy Luo holds up a N95 mask manufactured by 3M, one of the only masks that guards against germs such as severe acute respiratory syndrome (SARS) April 4, 2003 in Vancouver, British Columbia, Canada. A SARS clinic opened at noon today at St. Vincent's Hospital in Vancouver, British Columbia, Canada. SARS is a flu-like illness which has killed at least 80 people, mostly in Asia, and more than 2,200 have been infected around the world. U.S. President George W. Bush listed the mystery virus as a communicable disease by executive order today.  (Photo by Don MacKinnon/Getty Images)