RBFOX3 and infection: Despite the early vacuolization and loss of neurons (NeuN immunostained) in the LI9-infected CNS (Fig. S2A), we found no histologic evidence of infection, depletion or damage to granular, Purkinje or molecular layers of the cerebellum in POWV-infected 10- or 50-week-old mice 5–30 dpi (Fig. S2B).