CD79A and Anxiety: Trauma-exposed children exhibited more anxiety symptoms, which might be explained by three bio-behavioral paths: a mediated biological pathway through HPA-axis functioning (higher salivary cortisol in trauma-exposed mothers and also children), another biological pathway via the immune system (higher salivary immunoglobulin A (IgA) in trauma-exposed mothers and also children), and a third path with a behavioral link from diminished maternal supply to exposure to child anxiety.