** 1. since your child was affected with Typhoid thus important complication can be carrier state [after excluding other possible complications depending upon age and history provided] 2. check with Widal Test specifically for H and Vi- antigens where H-agglutinins develop as a result of previous inoculation and Vi-agglutinin is important in diagnosis of carriers. 3. Immunisation against Typhoid is available in form of Oral as well as in Injectable form, you can ask your Pediatrician for the same if not vaccinated for the same. 4. Recurrent fevers [getting every month] one has to exclude aphthous ulcers, pharyngitis,adenopathy, neutropenia in differential diagnosis. 5. The laboratory work-up in children with recurrent fever and associated allergy depends on careful history and physical examination [along with complete blood cell count (CBC) with DLC and platelet count, and ESR and C-reactive protein testing. Urine cultures are also useful, and [since he is ill again], blood cultures should be obtained. PS . Recurrent fevers with no defined underlying cause have a very favorable prognosis. .Recurrent fever in children usually resolves without any long-term adverse effects.