Table 2. Mean plaque diameter of parental and NY99/MX03 WNV chimeric viruses at 72 h p.i.

Virus	Plaque diameter (mm±sd)
WN/IC-P991	4.5±0.4
WN-MX03/IC	1.9±0.5
TM171-03-pp1	2.1±0.6
WN/IC-5′.E.3′	3.3±0.3
WN/IC-E	3.2±0.3
WN/IC-prM.E	1.9±0.3
WN-MX03/IC-prM.E	4.4±0.3