Facial cues to illness

Most of us can tell from facial cues and personality changes when someone we know is ill. Women particularly are skilled at this--but they use additional cues like voice, hair, clothing, tremors, gait, etc. But can you identify when a stranger in before and after photos is ill? Apparently, there is evidence that we can, and that ability may have saved our ancestors (and us) from being exposed to illness.

https://www.statnews.com/2018/01/02/illness-sick-faces-detection/