For some of those who are affected by WBC disorders, they may not experience any symptoms. If they do, symptoms may vary depending on the genre of the disorders. Besides, most symptoms may be closely related to different infections. For example, in most cases, people may suffer from fever, mouth ulcers, skin abscesses, and frequent or recurrent infections with unusual bacteria, viruses, or fungus. In severe cases, people may also end up with pneumonia. If any of the symptoms shows up, you’re highly suggested to check it out with your doctor!