Africa: Factbox - 10 Facts On How Mosquitoes Pose a Threat to Half the World

London — A warmer climate, travel and trade are helping to spread mosquito-borne diseases as a deadly beast smaller than a paper clip poses a threat to more than half the world's population.

World Mosquito Day on Tuesday commemorated the discovery in 1897 by British doctor Ronald Ross that female mosquitoes transmit malaria between humans but the World Health Organization (WHO) warns progress against malaria is stalling.

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