Ds aged 5 has been off colour for nearly 3 weeks now. He's had the odd day off school in this time & he seems to perk up but then goes back to being unwell within a couple of days. He's got quite a bad cough, seems to always develop a temp towards end of the day & has totally lost his appetite. A couple of weeks back he was sick at school & oddly for the rest of the day ate like a horse before going back to having no appetite.
Is this just a virus & is there anything we can do aside from giving him Calpol & cough medicine? Mainly worried about the lack of appetite, he's hardly eating a thing.