Infections that most often affect people with IgG deficiency are:
Sinus infections and other respiratory infections
Digestive tract infections
Ear infections
PneumoniaBronchitis
Infections that result in sore throat
Severe and life-threatening infections (rare)
In some people, infections cause scarring that harms the airways and how the lungs work. This can affect breathing. People with IgG deficiency also often find that pneumonia and the flu vaccines don’t keep them from getting these infections.