Hi Doctor, My 2yr old son is having fever from almost 10 days( it comes and goes) , but no other symptoms, he is very active even fever persist.. We visited a pedictrician, he suggested antibiotic called CEFEX for 5 days and will see if still fever persist, then will do blood checkup.. After started giving the antibiotic, he vomited what ever he eats.. Before he was fine, he was eating normaly, playing and all... We are in tension, not getting what to do!! Please suggest me what could be the cause?