 While the frequency of this mutation within Caucasian populations is 0.0808, people of African or Asian descent do not appear to possess this allele.Δ32 homozygotes, or individuals who possess two copies of the Δ32 variant, have no functional CCR5 receptors and are consequently highly resistant to HIV infection.Individuals who inherit one copy of Δ32 variant and one copy of the normal CCR5 gene are CCR5 heterozygotes.