My 1.5 year old cat has been lethargic for the last few days. Just sleeping all day, not moving much, sometimes crouching from discomfort. No vomitting, bathroom issues, or respiratory issues (meaning no sneezing, coughing, or runny eyes or nose). He is eating and drinking just fine. I was concerned so I took him to the vet today and just got back. The vet ran a few tests but everything showed up fine with him. She couldn't find what is causing his lethargy and said it's most likely just a mild viral infection. So she prescribed some prednisolone steroids for him. I asked what the steroids were for but they told me it would just help his immune system while he recovered from whatever is bothering him. Here's what has me confused though. I thought you couldn't treat or cure viral infections. I thought they just had to run their course. So what purpose does prednisolone serve here? I would rather not give my cat any medications unless its necessary for his comfort or to cure the problem. So I just need some help understanding why exactly I need to give him steroids if it's a viral infection.