Alum in FI-RSV was found to be responsible for inducing eosinophilia, mucus production, and lung histopathology by increasing RSV specific IL-4+ an TNF-α+ Th2 CD4+ T cell responses, and the mobilization of multiple DC subsets including CD11b+, CD103+, pDCs, and CD4+ DCs. The gene discussed is CD4; the disease is Increased total eosinophil count.