When you get body aches when sick, how does it feel? Does it have to be whole body or can it be just parts?

Today is day 3 of all my muscles in both arms SO sore. It feels like I’ve done an intense workout but I have done no exercise. I find it odd it’s all muscles in BOTH. So it’s not like I hurt myself trying to carry something or some other random injury. I’ve also had a sore throat. So I’m hoping it’s some sort of viral infection but I don’t feel sick. It’s kind of freaking me out.