3.3. Vitamin A Supplementation Increased RVA Specific IgA/IgG ASCs in Blood, Milk, and Tissues of RVA Inoculated VAD (VAD + VA + RVA) Sows While Vitamin A Deficiency Increased Frequencies of Total Ig-Secreting B Cells in Milk and Various Tissues, but Decreases Numbers of Total Memory B Cells in Milk. The gene discussed is CD79A; the disease is vitamin A deficiency.