Hong Kong Workers Clean Infected Apartment Block

HONG KONG - APRIL 4: Health workers wear full protective clothing during the cleaning up operation at Amoy Gardens where over 200 residents have been infected with the SARS (Severe Acute Respitory Syndrome) virus April 4, 2003 in Hong Kong. School closures have been extended until April 21 to prevent the spread of the disease in the territory. (Photo by Christian Keenan/Getty Images)

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