Suggest Treatment For Bronchitis, Ear Infection, Vomiting And Diarrhea

this is for my grandson who is 8 months old..he has had bronchitis and an ear infection and then a rash and then vomiting and diareha all since the beginning of january..the last time was last thursday for the vomiting and diareaha and they were told he had a virus..then they went back the following night becasue he was not urinating and still told it was a virus..today he is vomiting again and not urinating..