I'd sure like to get an effective agent out there.

With the available agents more or less equally effective.

It is an effective agent, but fish usually die due to its application.

The experience turned out to be vital to becoming an effective agent.

He's been one hell of an effective agent for the Empire.

This left vancomycin as the only effective agent available at the time.

We are probably years away from developing and introducing an effective agent.

Would they be an effective and positive agent of change?

It's about both services and neighbourhoods becoming far more effective agents of change.

Which was why she'd been such an effective agent.