Hello and welcome to Healthcare Magic. Thanks for your query.
Since your son's fever has been persistent for over 2 weeks, and since it has not responded to a course of antibiotics, it is advisable to have lab investigations done to ascertain the cause of the persistent fever. A viral fever
rarely lasts more than a week and so, it is important to look for other causes. There can be numerous causes for a persistent low grade fever in children
and a fever lasting more than 2 weeks definitely warrants further detailed evaluation. So, please take him to his doctor for a review and for further investigations.
Dr. Sheeba Stephen