Have Medical Questions? Ask a Doctor Online!
Hi and welcome.
Repeated infections are most likely due to decrease in immunity to fight against infections in the body. So yes, he needs full evaluation including baseline blood tests along with bone marrow biopsy and tests for autoimmune diseases so that any disease decreasing his immunity can be diagnosed and treated so that these infections can be prevented.
Let me know if you have further questions.
Please do not forget to leave a positive rating by clicking on stars on top right corner.
Wish you good health.