USB Flash Drive Virus Infection

[JakeElves]

A friend of mine downloaded something sketchy off the internet now it's got a virus(What a surprise). So now it's my job to fix it. My question is that will using a flash drive to format it infect it in the process? I'm planning on going on to the BIOS and booting into my Windows loaded flash drive. Because I'm not booting the HDD but my flash drive would that mean I wouldn't get infected? I just gotta make sure.


Edit: I just went and formatted it anyway but not gonna connect my flash drive into anything until I know for sure.

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