The most commonly quoted figure for the prevalence of<unk>  is around 1 in 100,000 births, although this is regarded by some to be an underestimate of the true prevalence; some estimates predict that the prevalence rate is as high as 1 in 50,000 live births. A figure of about 1 in 65,000 live births has been reported for Australia. Due to the particular genetic nature of<unk> , a higher prevalence may be found in certain regions and associated cultures where higher rates of consanguineous mating occur. A Moroccan study reported that consanguineous parenting was observed in 75% of the families of Moroccan<unk>  patients. Recent studies indicate that one in every 2,500 children in the Navajo population inherit<unk> . This condition is a significant cause of illness and death among Navajo children. Ongoing research reveals a similar genetic pattern among the related Apache people.
Severe combined immunodeficiency
Common variable immunodeficiency
X-linked severe combined immunodeficiency
X-linked agammaglobulinemia
Primary immunodeficiency
Combined immunodeficiencies
Chronic granulomatous disease
Adult-onset immunodeficiency syndrome