On the cover: Immunohistochemistry of IgA⁺ cells in murine colorectal mucosal sites. Coadministration of pCCL19 with HIV-1 gp140 results in an increased number of IgA⁺ cells (dark brown) in the colorectal mucosal surfaces. Hu, K., S. Luo, L. Tong, X. Huang, W. Jin, W. Huang, T. Du, Y. Yan, S. He, G. E. Griffin, R. J. Shattock, and Q. Hu. 2013. CCL19 and CCL28 augment mucosal and systemic immune responses to HIV-1 gp140 by mobilizing responsive immunocytes into secondary lymph nodes and mucosal tissue. J. Immunol. 191: 1935–1947.