WHIM Syndrome is a rare genetic disorder that affects the immune system. It is not contagious and cannot be transmitted from person to person. WHIM Syndrome is caused by a mutation in the CXCR4 gene, which leads to impaired immune cell function. This condition is inherited in an autosomal dominant pattern, meaning that an affected individual has a 50% chance of passing the gene mutation to their children. WHIM Syndrome requires medical management and treatment by healthcare professionals.