https://www.flutrackers.com/threads/world-health-organization-influenza-update-mexico-influenza-a-outbreak-in-chihuahua-state-april-8-2011.106949/
World Health Organization, Influenza Update: Mexico, Influenza A outbreak in Chihuahua state (April...
Source: World Health Organization, http://www.who.int/csr/disease/influenza/latest_update_GIP_surveillance/en/index.html April 8 2011 (...) Mexico...
world health organizationchihuahua stateinfluenzaupdatemexico