My son has been having many unusual health problems?

over the past year my 14 year old son has been having frequent health issues. he has had the shingles virus two times, appendicits, and extreme joint and back pain. he had a 105 fever and was hospitalized for bronchitis last week, he is currently being tested for an immune deficieny. he also had a thyroglossal cyst on his throat removed at age 5.