Frequent infections
Infections that are severe or hard to recover from
Recurrent sinus, ear, lung, or skin infections
Slow wound healing
Persistent fatigue
Frequent fevers
Unexplained weight loss
Chronic diarrhea
Mouth sores or thrush
Swollen lymph nodes
Poor response to vaccines
Repeated need for antibiotics
Infections with unusual or opportunistic germs
Family history of immune system problems
Autoimmune symptoms
If you are concerned, see a healthcare professional