IFNB1 and eye infection: Similar to LAT(+) infected mice, 21 of 28 (75%) of WT mice infected with 2 × 105 PFU/eye of LAT(-) virus survived ocular infection, while 20 of 49 (41%) of infected IFNβ-/- mice survived ocular infection [Table 1; P = 0.01, 2 × 105, LAT(-)].