Some people can tell if you have an infection just by looking at you

People in different cultures – including hunter-gatherers in equatorial rainforests and city dwellers in Europe – can tell when someone else is in the early stages of infection by looking at them

Some people can tell if you have an infection just by looking at you
People in different cultures – including hunter-gatherers in equatorial rainforests and city dwellers in Europe – can tell when someone else is in the early stages of infection by looking at them