Long-lasting insecticidal malaria nets' biological effectiveness may be short-lived GlobalHealthBMJ
Potentially life-saving insecticidal malaria nets, designed to be biologically effective for at least 3 years, may stop working well after just 12 months, suggests research of their use in one East African country and published online in the open access journalhave proved essential in preventing malaria cases in Africa, and are thought to have contributed to a worldwide fall in malaria prevalence between 2000 and 2015, averting more than 600 million clinical cases since 2000.
During this timeframe, the government rolled out mass distribution of long lasting insecticidal malaria nets—one in June 2014, one in September 2017, and a third at the end of 2019, with the aim of providing one bed net for two people in line with WHO standards. But in the second and third years afterwards, malaria cases started to rise again—and to levels higher than before mass distribution efforts—suggesting that the nets lost their effectiveness after just one year, say the researchers.
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