#Publichealth officials use a variety of surveillance methods to detect disease outbreaks early, from monitoring social media chatter to analyzing sewage for pathogens. A public health expert explains how these systems work: https://theconversation.com/public-health-surveillance-from-social-media-to-sewage-spots-disease-outbreaks-early-to-stop-them-fast-235611
By John Duah, Auburn University