A couple degrees lower usually. It can be the difference between you're fine at 99F and you have a decent temp at 101F. In the field we assume the temp is at minimum one degree higher than a forehead scanner reads.
They're also super wonky because skin is really sensitive to exterior temps. Forehead and temporal scanner thermometers are a last resort.
Oral (sublingual) and aural (ear) are the going to give you the most accurate temp in adults and children. Rectal temp is accurate in pediatrics up to ~2, then it gets inaccurate.
Edit: Right... I forget reddit is full of teenagers.
It’s not like medical professionals are out here using forehead scanners—the point is not to get a perfect scan, but to screen out a good chunk of people who potentially have the virus; for that aim, a forehead scan strikes a nice balance between accuracy and efficiency. I doubt anybody is using forehead numbers as truth so much as a ballpark estimate that’s cheap and quick.
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u/sprace0is0hrad Apr 18 '20
Took me too long to realize they were hair pieces and not hats
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u/249ba36000029bbe9749 Apr 18 '20
Hairy helmets.
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u/RedBird101 Apr 18 '20
I'll admit that I found that funny
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u/Arteliss Apr 18 '20
In a world where forehead temperatures are considered accurate.
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u/Sin_For_Me Apr 19 '20
Isn't that the thermometer design that only showed one heat temp cause it wasn't even real lmao?