IFNB1 and eye infection: Similar to mice infected with LAT(+) virus, six of eight (75%) WT mice infected with 1 × 105 PFU/eye of LAT(-) virus survived ocular infection, while 19 of 32 (41%) of infected IFNβ-/- mice survived ocular infection [Table 1; P < 0.05, 1 × 105, LAT(-)].