http://en.wikipedia.org/wiki/Fever

"high-grade: > 40 °C (> 104 °F)"

Mercury in thermometers isn't used very often anymore because the Mad
Hatter was always late.

Never know how much I love you
Never know how much I care
When you put your arms around me
I get a fever that's so hard to bear

You give me fever, when you kiss me
Fever when you hold me tight
Fever in the morning
Fever all through the night

Sun lights up the daytime
Moon lights up the night
My eyes light up when you call My name
'Cause I know you're gonna treat me right

you probably already know this
but i am gonna say it just in case you don't

in usa, 10 4 is the way radio communications people say "yes, i have
verified your last statement"

maybe this is a global convention i don't know