They use cell phone data to track movements of about 15 million people . But attempts to control transmission by targeting human travel between regions `` will be completely different from those that concentrate on local transmission hot spots , focusing on communicating risks to travelers to alter their behaviors , restricting travel patterns , and/or conducting routine surveillance in high-risk areas . '' Using data on malaria prevalence , they can see how human travel contributes to its spread . Many Nairobi residents carry the malaria parasite back with them after traveling elsewhere . A child dies every minute in Africa because of malaria .
They use cell phone data to track movements of about 15 million people . Using data on malaria prevalence , they can see how human travel contributes to its spread . Many Nairobi residents carry the malaria parasite back with them after traveling elsewhere . A child dies every minute in Africa because of malaria .