One medical oddity that a lot of people might be overlooking in regards to running a fever...

[canetoad]

2. Was reading about this recently

I've bought an inexpensive digital thermometer, so I can monitor temperature during Covid.

Normal Range

Not everyone’s “normal” body temperature is the same. Yours could be a whole degree different than someone else’s. A German doctor in the 19th century set the standard at 98.6 F, but more recent studies say the baseline for most people is closer to 98.2 F.

For a typical adult, body temperature can be anywhere from 97 F to 99 F. Babies and children have a little higher range: 97.9 F to 100.4 F.

Your temperature doesn’t stay same all day, and it will vary throughout your lifetime, too. Some things that cause your temperature to move around during the day include:

How active you are
What time of day it is
Your age
Your sex
What you’ve eaten or had to drink
(If you’re a woman) where you are in your menstrual cycle

https://www.webmd.com/first-aid/normal-body-temperature#1