Morning Briefing

"Malaria-carrying mosquitoes are disappearing in some parts of Africa, ... indicat[ing] controls such as anti-mosquito bed nets are having a significant impact on the incidence of malaria in some sub-Saharan countries," researchers report in a paper published in Malaria Journal, according to BBC News. But the team of Danish and Tanzanian "researchers say mosquitoes are also disappearing from areas with few controls," and "[t]hey are uncertain if mosquitoes are being eradicated or whether they will return with renewed vigor," the news agency writes (McGrath, 8/26).