In contrast, in patients with allergic bronchopulmonary aspergillosis (ABPA), A. fumigatus-specific Th2 CD4+ T cells are predominant (45) and a recent work has identified SNPs in genes related with Th2 responses like IL13 and IL4R that increase ABPA susceptibility (46). Here, CD4 is linked to allergic bronchopulmonary aspergillosis.