Acne isn't really caused by a virus, it's usually caused by bacteria and/or sebum buildup beneath the skin.

Herpes simplex is a virus that causes bumps around the mouth for which they use Valtrex, which can be expensive.

But I'm guessing we're talking about run of the mill acne here... do you know the name of the medicine your doctor prescribed?

full body but in mild reverse severse that looks mild

Isotretinoin (Accutane)

Tretinoin

Oral antibiotics

Accutane can be around $500 per fill if your insurance doesn't cover it.

Topical gels (tretinoin) is usually cheaper but still expensive.

You can definitely find some cheap antibiotics though, most are generic.