highly significantP < 0.001
Statistically significant differences in viral titer were determined by unpaired Student t-test (*, P < 0.05, significant; **, P < 0.01, very significant; ***, P < 0.001, highly significant).
Statistically significant differences in viral titer were determined by unpaired Student t-test (*, P < 0.05, significant; **, P < 0.01, very significant; ***, P < 0.001, highly significant).