The antivirus software detected a virus.

The doctor detected a disease.

The doctor detected a lump in her breast.

The smoke detector detected a fire.

I detected a smell of gas.

The security system detected an intruder.

The dog detected drugs.

The police detected a suspicious package.

I detected a hint of nervousness in his smile.

The dog detected the presence of drugs.

The leak was detected by the water sensor.

A fire was detected in the kitchen.

The virus was detected by the antivirus software.

The air defence radar detected incoming threats.

Blood tests can detect infections.