Fig. 2: Challenge dose and post-challenge responses.

The challenge was performed via a small particle aerosol of EEEV. Challenge dose delivered per animal determined via plaque assay (A) displayed as mean +/− SE. Kaplan-Meier plot of survival (B). NEC = day of necropsy. Group comparisons were performed using Mantel-Cox test. Asterisks represent significant differences. *p < 0.05; **p < 0.01. Temperature changes over time for each group as determined by implanted data loggers (C) with smoothed lines for easier visualization (D). Note the carat ‘A’ on X-axis represents the timing of the prime vaccination for both cohorts while ‘B’ and ‘C’ represent boost vaccinations for cohort 1 and 2, respectively. Time ‘0’ on X-axis and intersection with Y-axis represent the time of challenge.