A woman wears a mask as she walks along a small market in Mexico City
Source: Reuters
A woman wears a mask as she walks along a small market in Mexico City April 25, 2009. A new flu strain that has killed up to 68 people in Mexico could become a global pandemic, the World Health Organization warned on Saturday, as health experts tried to track the disease's spread. REUTERS/Eliana Aponte (MEXICO SOCIETY HEALTH ENVIRONMENT)
REUTERS/ELIANA APONTE
REUTERS/ELIANA APONTE
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