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TOKYO, JAPAN - AUGUST 28: A workman sprays pesticide in Yoyogi Park on August 28, 2014 in Tokyo, Japan. Sections of Yoyogi Park were closed to the public today as they underwent fumigation after three people were diagnosed with dengue fever after suffering mosquitoe bites in the park. According to a Health Ministry statement, these were the first domestic cases of dengue fever in Japan in 70 years. (Photo by Chris McGrath/Getty Images)
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TOKYO, JAPAN - AUGUST 28: A workman sprays pesticide in Yoyogi Park on August 28, 2014 in Tokyo, Japan. Sections of Yoyogi Park were closed to the public today as they underwent fumigation after three people were diagnosed with dengue fever after suffering mosquitoe bites in the park. According to a Health Ministry statement, these were the first domestic cases of dengue fever in Japan in 70 years. (Photo by Chris McGrath/Getty Images)
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TOKYO, JAPAN - AUGUST 28: Workers spray pesticide in Yoyogi Park on August 28, 2014 in Tokyo, Japan. Sections of Yoyogi Park were closed to the public today as they underwent fumigation after three people were diagnosed with dengue fever after suffering mosquitoe bites in the park. According to a Health Ministry statement, these were the first domestic cases of dengue fever in Japan in 70 years. (Photo by Chris McGrath/Getty Images)
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TOKYO, JAPAN - AUGUST 28: A workman sprays pesticide in Yoyogi Park on August 28, 2014 in Tokyo, Japan. Sections of Yoyogi Park were closed to the public today as they underwent fumigation after three people were diagnosed with dengue fever after suffering mosquitoe bites in the park. According to a Health Ministry statement, these were the first domestic cases of dengue fever in Japan in 70 years. (Photo by Chris McGrath/Getty Images)
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TOKYO, JAPAN - AUGUST 28: A workman sprays pesticide in Yoyogi Park on August 28, 2014 in Tokyo, Japan. Sections of Yoyogi Park were closed to the public today as they underwent fumigation after three people were diagnosed with dengue fever after suffering mosquitoe bites in the park. According to a Health Ministry statement, these were the first domestic cases of dengue fever in Japan in 70 years. (Photo by Chris McGrath/Getty Images)
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TOKYO, JAPAN - AUGUST 28: A workman sprays pesticide in Yoyogi Park on August 28, 2014 in Tokyo, Japan. Sections of Yoyogi Park were closed to the public today as they underwent fumigation after three people were diagnosed with dengue fever after suffering mosquitoe bites in the park. According to a Health Ministry statement, these were the first domestic cases of dengue fever in Japan in 70 years. (Photo by Chris McGrath/Getty Images)
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TOKYO, JAPAN - AUGUST 28: A workman sprays pesticide in Yoyogi Park on August 28, 2014 in Tokyo, Japan. Sections of Yoyogi Park were closed to the public today as they underwent fumigation after three people were diagnosed with dengue fever after suffering mosquitoe bites in the park. According to a Health Ministry statement, these were the first domestic cases of dengue fever in Japan in 70 years. (Photo by Chris McGrath/Getty Images)
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TOKYO, JAPAN - AUGUST 28: Workers spray pesticide in Yoyogi Park on August 28, 2014 in Tokyo, Japan. Sections of Yoyogi Park were closed to the public today as they underwent fumigation after three people were diagnosed with dengue fever after suffering mosquitoe bites in the park. According to a Health Ministry statement, these were the first domestic cases of dengue fever in Japan in 70 years. (Photo by Chris McGrath/Getty Images)
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TOKYO, JAPAN - AUGUST 28: A workman sprays pesticide in Yoyogi Park on August 28, 2014 in Tokyo, Japan. Sections of Yoyogi Park were closed to the public today as they underwent fumigation after three people were diagnosed with dengue fever after suffering mosquitoe bites in the park. According to a Health Ministry statement, these were the first domestic cases of dengue fever in Japan in 70 years. (Photo by Chris McGrath/Getty Images)
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TOKYO, JAPAN - AUGUST 28: A workman sprays pesticide in Yoyogi Park on August 28, 2014 in Tokyo, Japan. Sections of Yoyogi Park were closed to the public today as they underwent fumigation after three people were diagnosed with dengue fever after suffering mosquitoe bites in the park. According to a Health Ministry statement, these were the first domestic cases of dengue fever in Japan in 70 years. (Photo by Chris McGrath/Getty Images)
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TO GO WITH AFP STORY by Natalia Ramos
A researcher examines transgenic Aedes aegypti mosquitos kept in cages to collect their eggs, at a laboratory of biotech company Oxitec, in Campinas, 100 km from Sao Paulo, Brazil, on August 21, 2014. Oxitec produces genetically modified mosquitoes to fight dengue, a deadly tropical disease more prevalent in Brazil than anywhere else in the world. The factory developed a technology where eggs of Aedes aegypti receive microinjection of DNA with genes that produce a protein which prevents their offsprings from reaching adulthood and thus reducing the total population of transmitters of dengue. AFP PHOTO / NELSON ALMEIDA (Photo credit should read NELSON ALMEIDA/AFP/Getty Images)
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SANTA CLARA, VILLA CLARA, CUBA - 2014/07/30: Cuba fights the Aedes aegypti by fumigating frecuently in homes and business, the country is suffering Dengue and Chikungunya virus. (Photo by Roberto Machado Noa/LightRocket via Getty Images)
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SANTA CLARA, VILLA CLARA, CUBA - 2014/07/30: Cuba fights the Aedes aegypti by fumigating frecuently in homes and business, the country is suffering Dengue and Chikungunya virus. (Photo by Roberto Machado Noa/LightRocket via Getty Images)
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A worker from Haiti's Ministry of Public Health and Population sprays chemical to exterminate mosquitoes in a neighborhood of Petion Ville in Port-au-Prince on May 21, 2014. A worker said the procedure is to help prevent chikungunya, dengue, malaria and filariose. AFP PHOTO / Hector RETAMAL (Photo credit should read HECTOR RETAMAL/AFP/Getty Images)
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A worker from Haiti's Ministry of Public Health and Population sprays chemical to exterminate mosquitoes in a neighborhood of Petion Ville in Port-au-Prince on May 21, 2014. A worker said the procedure is to help prevent chikungunya, dengue, malaria and filariose. AFP PHOTO / Hector RETAMAL (Photo credit should read HECTOR RETAMAL/AFP/Getty Images)
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RIO DE JANEIRO, BRAZIL - MAY 10: Children play in the rubble of a former home next to construction in the Manguinhos 'favela' on May 10, 2014 in Rio de Janiero, Brazil. Residents from one section of the favela, visited by Pope Francis in July 2013, have been affected by construction from an improvement works project begun in 2008. A full sanitation system has yet to be built. Some have been evicted from the area as Rio prepares for the 2014 FIFA World Cup and Rio 2016 Olympic Games. Children living in the affected area have been injured from playing in the rubble while complaining of breathing problems from dust and stomach aches. One child contracted Dengue fever twice and family members believe it was caused by stagnant water in the construction area. (Photo by Mario Tama/Getty Images)
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RIO DE JANEIRO, BRAZIL - MAY 10: Children play in the rubble of a former home next to ongoing construction in the Manguinhos 'favela' on May 10, 2014 in Rio de Janiero, Brazil. Residents from one section of the favela, visited by Pope Francis in July 2013, have been affected by construction from an improvement works project begun in 2008. A full sanitation system has yet to be built. Some have been evicted from the area as Rio prepares for the 2014 FIFA World Cup and Rio 2016 Olympic Games. Children living in the affected area have been injured from playing in the rubble while complaining of breathing problems from dust and stomach aches. One child contracted Dengue fever twice and family members believe it was caused by stagnant water in the construction area. (Photo by Mario Tama/Getty Images)
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A worker fumigates an area to kill mosquitoes that may carry dengue fever in Jimbaran on the resort island of Bali on April 15, 2014. Dengue fever is spread by mosquitoes and causes joint pain, nausea, high fevers, and rashes and in severe cases, it results in death. AFP PHOTO/SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)
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A worker fumigates an area to kill mosquitoes that may carry dengue fever in Jimbaran on the resort island of Bali on April 15, 2014. Dengue fever is spread by mosquitoes and causes joint pain, nausea, high fevers, and rashes and in severe cases, it results in death. AFP PHOTO/SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)
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Employees from the Philippines Department of Health perform a 'mosquito dance' with mascots (foreground) to create public awareness of vector-borne diseases in observance of World Health Day in Manila on April 7, 2014. According to the World Health Organization 40 percent of the world's population is at risk from dengue fever. Dengue is spread by mosquitoes that breed in stagnant water and usually bite people during daytime. AFP PHOTO / Jay DIRECTO (Photo credit should read JAY DIRECTO/AFP/Getty Images)
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Employees from the Philippines Department of Health perform a 'mosquito dance' with mascots (foreground) to create public awareness of vector-borne diseases in observance of World Health Day in Manila on April 7, 2014. According to the World Health Organization 40 percent of the world's population is at risk from dengue fever. Dengue is spread by mosquitoes that breed in stagnant water and usually bite people during daytime. AFP PHOTO / Jay DIRECTO (Photo credit should read JAY DIRECTO/AFP/Getty Images)
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A boy affected by dengue fever rests at the pediatric ward of the University Hospital in Tegucigalpa on March 3, 2014. Honduran officials issued a warning light after more 1,000 people were affected by dengue during this year, and left 29 dead and 39,000 infected during past year. AFP PHOTO/Orlando SIERRA. (Photo credit should read ORLANDO SIERRA/AFP/Getty Images)
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A girl affected by dengue fever rests at the pediatric ward of the University Hospital in Tegucigalpa on March 3, 2014. Honduran officials issued a warning light after more 1,000 people were affected by dengue during this year, and left 29 dead and 39,000 infected during past year. AFP PHOTO/Orlando SIERRA. (Photo credit should read ORLANDO SIERRA/AFP/Getty Images)
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A municipal council worker dispenses insecticide using a fogging machine during a dengue prevention spraying in Ampang, in the suburbs of Kuala Lumpur on February 11, 2014. Deaths from dengue fever have nearly tripled in Malaysia this year compared to the same period in 2013, sparking a stepped-up campaign to control the mosquitos that spread the virus. AFP PHOTO / MOHD RASFAN (Photo credit should read MOHD RASFAN/AFP/Getty Images)
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A municipal council worker (R) dispenses insecticide using a fogging machine as children sit inside a car with a reflection of a Malaysian flag during a dengue prevention spraying in Ampang, in the suburbs of Kuala Lumpur on February 11, 2014. Deaths from dengue fever have nearly tripled in Malaysia this year compared to the same period in 2013, sparking a stepped-up campaign to control the mosquitos that spread the virus. AFP PHOTO / MOHD RASFAN (Photo credit should read MOHD RASFAN/AFP/Getty Images)
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A Malaysian resident protects her face while engulfed in a cloud of pesticide during a dengue prevention spraying in Ampang, in the suburbs of Kuala Lumpur on February 11, 2014. Deaths from dengue fever have nearly tripled in Malaysia this year compared to the same period in 2013, sparking a stepped-up campaign to control the mosquitos that spread the virus. AFP PHOTO / MOHD RASFAN (Photo credit should read MOHD RASFAN/AFP/Getty Images)
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A police officer stands guard at the residence of Panama's former dictador Manuel Antonio Noriega, currently imprisoned in Panama, in Panama City, as it is being demolished on January 9, 2014 following a decision by the Health Ministry for considering it a breeding site of the Aedes mosquito that transmits dengue. Noriega, 79, who was extradited from France in 2011, is serving three 20-year prison terms for the disappearance of opposition activists during his years in power (1983-89). The former dictator has been petitioning to be placed under house arrest since 2012, arguing that his ailing health warrants it. Noriega was toppled from power in a US invasion in 1989, and spent nearly two decades in prison in the United States and France on drug charges. AFP PHOTO/ Rodrigo ARANGUA (Photo credit should read RODRIGO ARANGUA/AFP/Getty Images)
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A police officer walks at the residence of Panama's former dictador Manuel Antonio Noriega, currently imprisoned in Panama, Panama City, as it is being demolished on January 9, 2014 following a decision by the Health Ministry for considering it a breeding site of the Aedes mosquito that transmits dengue. Noriega, 79, who was extradited from France in 2011, is serving three 20-year prison terms for the disappearance of opposition activists during his years in power (1983-89). The former dictator has been petitioning to be placed under house arrest since 2012, arguing that his ailing health warrants it. Noriega was toppled from power in a US invasion in 1989, and spent nearly two decades in prison in the United States and France on drug charges. AFP PHOTO/ Rodrigo ARANGUA (Photo credit should read RODRIGO ARANGUA/AFP/Getty Images)
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MUZAFFARNAGAR, INDIA - DECEMBER 1: Shehnaaz, 34, and husband Mohd. Shehzad, 38, show a local newspaper cutting which carried the photograph of their son who died because of dengue at Loi camp on December 1, 2013 in Muzaffarnagar, India. More than 50 children and many old age people have died because of cold and lack of medical facilities in the relief camps set up for Muzaffarnagar riots victims. (Photograph by Raj k Raj/Hindustan Times via Getty Images)