Are viral infections or bacterial infections treated with antibiotics?

Antibiotics are only for suscpetible bacteria.

Antiviral meds, are for susceptible viruses.

Viruses and bacteria are two different things.

"Antibiotic" literally means "against life". Although they replicate inside living cells, viruses are not living things, and thus not affected by antibiotic drugs. If you have a bad cold or flu, and your doctor prescribes antibiotics, change doctors; you're wasting your money.

Although one often hears phrases like "killed virus" vaccine, it means the virus' ability to replicate inside a living cell has been inactivated ("killed") before being injected. But the body still reacts to it as though it were "live", and produces antibodies.