#sentinel

#sentinel

A team of researchers from the Broad Institute and Harvard began to suspect nearly two decades ago that so-called "emerging diseases" such as Ebola and Lassa virus were not quite what they seemed. Rather than being newly evolved contagions, mounting evidence suggested they were ancient pathogens that had circulated among humans for thousands of years. What really was emerging was accurate diagnosis: Medicine only recently had acquired the ability to detect these diseases and track the toll of outbreaks.