Satellite images of nighttime lights, normally used to detect population centers, also can help keep tabs on diseases in developing nations, according to new research. An international research team that includes Matthew Ferrari, assistant professor of biology at Penn State, found that the composited images accurately indicate fluctuations in population density—and thus the corresponding risk of epidemic—that can elude current methods of monitoring outbreaks. The research is expected to help medical professionals synchronize vaccination strategies with increases in population density.

A free public lecture titled "On the Eve of Eradication? Outbreak Dynamics and Vaccine Policy in the Developing World" will take place from 11 a.m. to 12:30 p.m. on Feb. 19 in room 100 of the Thomas Building on the University Park campus. The lecture, part of this year's Penn State Lectures on the Frontiers of Science series, will be delivered by Matthew Ferrari, assistant professor of biology at Penn State. This will be the fifth of six lectures in the series, which takes place on consecutive Saturday mornings. It is not necessary to register for the event.