Humans can spot small signs of sickness at a glance, by using a host of facial cues – visible just hours after an infection starts – to avoid contracting illnesses from others, finds new double-blind, randomized, placebo-controlled study.

Humans can spot small signs of sickness at a glance, by using a host of facial cues – visible just hours after an infection starts – to avoid contracting illnesses from others, finds new double-blind, randomized, placebo-controlled study.: http://ift.tt/2CvJGmJ Read more... http://ift.tt/2CvD2Nr