ITGAX and infection: To look for an effect of sgg1 on tropism, we stained lungs 1 dpi for CD68 and CD11c to mark myeloid cells, SPC to mark AECII and the MCMV immediate-early nuclear protein to mark active infection [using monoclonal antibody (MAb) CROMA 101, kindly provided by Stipan Jonjic, University of Rijeka] (Fig. 3g).