ANDY CRUMP, TDR, WHO / SCIENCE PHOTO LIBRARY ANDY CRUMP, TDR, WHO / SCIENCE PHOTO LIBRARY
Mosquito pest control. Health worker spraying a house with insecticide to kill mosquitoes. The insecticide is sprayed in a vapour form, so the process is called fumigation. Mosquitos can transmit several diseases to humans, and killing them can reduce infection rates. This fumigation was carried out as part of a weekly inspection during an epidemic of dengue fever. This is caused by several viruses transmitted to humans through mosquito bites. Photographed in Cuba.
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