There are no antibiotics for virus infection. The doctor may give you fever reducers. He may also prescribe antibiotics, however, those are to counter any secondary infections you may catch while sick. If a doctor prescribes antibiotics, it is highly necessary to complete the full course. If you stop taking the antibiotics midway, your body will create antibiotic-resistant bacteria. So, in future, if you are prescribed antibiotics for any illness, some of them might not work for you due to the presence of the resistant bacterias in your body.