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A dog owner restrains his pet to keep the dog from attacking a worker from the health ministry fumigating the owner's home, in Managua, Nicaragua, Thursday, Oct. 31, 2013. According to the government, more than 5,000 cases of dengue have been reported this year and has claimed 14 lives. (AP Photo/Esteban Felix) ( Nicaragua Dengue )

Twenty-seven-year-old Valeria Garcia (C), waits to be treated for dengue fever, outside the Cristo del Rosario health centre in Managua, on October 25, 2013. The Nicaraguan government issued a health red alert as a dengue fever epidemic has killed 13 people so far this year - six in the past week - and infected more than 4,000 individuals, according to presidential spokesman Rosario Murillo. Dengue, transmitted by the Aedes aegypti mosquito, occurs in Central America mostly during its rainy season from May to November. The disease causes fever, muscle and joint ache as well as potentially fatal dengue hemorrhagic fever and dengue shock syndrome. Inti Ocon/AFP/Getty Images ( 524088660 )

People wait to be treated from dengue fever, at the Cristo del Rosario health centre in Managua, on October 25, 2013. The Nicaraguan government issued a health red alert as a dengue fever epidemic has killed 13 people so far this year - six in the past week - and infected more than 4,000 individuals, according to presidential spokesman Rosario Murillo. Dengue, transmitted by the Aedes aegypti mosquito, occurs in Central America mostly during its rainy season from May to November. The disease causes fever, muscle and joint ache as well as potentially fatal dengue hemorrhagic fever and dengue shock syndrome. Inti Ocon/AFP/Getty Images ( 524088627 )

Kevin Flores, 11, remains under a mosquito net as he is being treated for dengue fever, at "La Mascota" hospital in Managua, on October 30, 2013. The Nicaraguan government issued a health red alert as a dengue fever epidemic has killed 14 people so far this year and infected more than 5,000 individuals. Dengue, transmitted by the Aedes aegypti mosquito, occurs in Central America mostly during its rainy season from May to November. The disease causes fever, muscle and joint ache as well as potentially fatal dengue hemorrhagic fever and dengue shock syndrome. Inti Ocon/AFP/Getty Images ( 524238025 )

A man waits for his daughter to the treated for dengue fever, at the Cristo del Rosario health centre in Managua, on October 25, 2013. The Nicaraguan government issued a health red alert as a dengue fever epidemic has killed 13 people so far this year - six in the past week - and infected more than 4,000 individuals, according to presidential spokesman Rosario Murillo. Dengue, transmitted by the Aedes aegypti mosquito, occurs in Central America mostly during its rainy season from May to November. The disease causes fever, muscle and joint ache as well as potentially fatal dengue hemorrhagic fever and dengue shock syndrome. Inti Ocon/AFP/Getty Images ( 524088644 )

A worker from the Nicaraguan health ministry fumigates inside a home in Managua, Nicaragua, Thursday, Oct. 31, 2013. According to the government, more than 5,000 cases of dengue have been reported this year and has claimed 14 lives. (AP Photo/Esteban Felix) ( Nicaragua Dengue )

A member of the Health Ministry fumigates a home against the Aedes aegypti mosquito to prevent the spread of dengue fever in Managua, on October 25, 2013. The Nicaraguan government issued a health red alert as a dengue fever epidemic has killed 13 people so far this year - six in the past week - and infected more than 4,000 individuals, according to presidential spokesman Rosario Murillo. Dengue, transmitted by the Aedes aegypti mosquito, occurs in Central America mostly during its rainy season from May to November. The disease causes fever, muscle and joint ache as well as potentially fatal dengue hemorrhagic fever and dengue shock syndrome. Inti Ocon/AFP/Getty Images ( 524088482 )

A worker from the Nicaraguan health ministry appears from a doorway in a cloud of insecticide after fumigating a home in Managua, Nicaragua, Thursday, Oct. 31, 2013. According to the government, more than 5,000 cases of dengue have been reported this year and has claimed 14 lives. (AP Photo/Esteban Felix) ( Nicaragua Dengue )

A girl uses a handkerchief to cover her nose and mouth as she holds her pet parakeet, while a worker from the Nicaraguan health ministry fumigates in her neighborhood in Managua, Nicaragua, Thursday, Oct. 31, 2013. According to the government, more than 5,000 cases of dengue have been reported this year and has claimed 14 lives. (AP Photo/Esteban Felix) ( Nicaragua Dengue )