IL33 and infection: While there was a modest increase in overall T cell number with ZIKV-Dakar infection in Il33–/–mice, no differences in Tconv, Treg, or CD8 T cells were seen in Il33–/–animals with ZIKV-Dakar infection, with MFIs of CD44 and CD69 unchanged in Tconv and CD8 T cells (Fig 3C).