It has recently been shown that viral populations <*> may already contain enough genetic variability in the target sequence
Furthermore , it has also been shown that viral populations <*> speed up this process .
It has recently been shown that viral populations not experiencing strong selective pressure from an antiviral amiR may already contain enough genetic variability in the target sequence to escape plant resistance in an almost deterministic manner .
Furthermore , it has also been shown that viral populations exposed to subinhibitory concentrations of the antiviral amiR speed up this process .