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ARITA, JAPAN - JULY 06: A mosquito coil is inspected in a laboratory at the Kishu Factory of Dainihon Jochugiku Co. Ltd. on July 6, 2016 in Arita, Japan. Japanese insect repellent manufacturer Dainihon Jochugiku Co., Ltd. has donated their mosquito repellent products to the Japan Olympics Committee to support the health of the Olympians during the Rio Olympics 2016. According to the International Federation of the Red Cross, personal repellent and coils donated by a U.S. based SC Johnson will be distributed to the vulnerable communities in South and Central American countries to provide preventative resources against mosquito-borne diseases. (Photo by Tomohiro Ohsumi/Getty Images)