Now , thermal imaging has found use in medicine apart from other conventional earth sensing. yes, It helps sense people with fever. Very useful to isolate people affected with swine flu, SARS and other infectious diseases in public places
yet not a fool proof , because
an infected person can spread the virus even before symptoms show up. The incubation period for H1N1 is 24-48 hours.
Since clothing can alter the thermal image produced, only the exposed parts of the body can reveal the real body temperature.
futhur reference
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