FIG. 1.
(A) Passive administration of mouse serum to μMT mice. Serum was collected from immune (day 28 postinfection; titer ≈1/10,000) wild-type mice and pooled. After heat inactivation, the indicated amounts of serum were administered in a divided dose to μMT mice 1 day prior to and after infection with 102 PFU of WNV. Data reflect between 5 and 10 mice per condition. (B) Passive administration of mouse serum to RAG1 mice. Immune serum (1 ml) or PBS was administered in a divided dose to RAG1 mice 1 day prior to and after infection with 102 PFU of WNV. Data reflect between 5 and 10 mice per condition.