My older boys have both had a bug followed by an ear infection. They are currently on antibiotics, but after dinner my 9 month old started feeling a bit warm and he's got the runny nose like they had. Their fever's went up to 103, I can't remember at what temp you're supposed to rush an infant to the ER. I'm thinking 103...but I'm not sure. My Doctor has changed it on me a few times over the years.