Hi Reddit! I’m Nick Warren Ruktanonchai, a postdoctoral research fellow at the University of Southampton. I’m interested in understanding how people move, which helps us predict when, where, and why some people become exposed to areas with infectious diseases. And I am Cori Warren Ruktanonchai, a PhD student in Geography & Environment at the University of Southampton–as you may have noticed by the names, I also happen to be Nick’s wife! I’m interested in using spatial statistics to better locate pregnant women, mothers and newborns at risk of adverse health outcomes. We recently published an article titled “Identifying Malaria Transmission Foci for Elimination Using Human Mobility Data” in PLOS Computational Biology, mapping where people got malaria based on their travel patterns. We combined data from 1.19 million mobile phones in Namibia with a map of malaria prevalence to predict areas where the most people get infected. We hope that by targeting these hotspots, elimination efforts can both send help where it’s most needed and reduce transmission nationwide. Call and text locations from mobile phones are a great tool for knowing where people have been. At Flowminder, we’ve used mobile phone data to not only help governments and NGOs predict the spread of disease, we’ve also used it to understand how people move after catastrophes, including a PLOS Medicine paper on the 2010 Haiti earthquake and a PLOS Currents paper on the 2015 Nepal earthquake. We’ll be answering your questions at 1pm ET – Ask Us Anything! Don’t forget to follow Nick on Twitter at @nruktanonchai and Cori at @cwruktanonchai. Also, the Flowminder Foundation can be found at @flowminder, and the WorldPop Project at @WorldPopProject!