We humans have the innate ability to tell whether or not someone is sick, even at the onset of infection. Of course, if someone is doubled over hacking and coughing that’s a telltale sign. But even when someone has initially caught the bug, subtle clues are evident that we have the ability to pick up on. A study was done where individuals viewed photos of people who had just been injected with E coli or a placebo. The viewers were able to successfully differentiate.
Here are some signs: pale lips, a downward turn of the mouth, and droopy eyelids.
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