He is working as a medical practitioner.

The effect of this medicine is to alleviate the symptoms of a cold.

He has expert knowledge.

He is studying computer science at a specialized school.

He couldn't say anything about issues outside of his field of expertise.

There are many different specialty stores in this town.

He is a specialist fool, with no interest in anything outside his field.

Hand washing and wearing masks are important for the prevention of COVID-19.

Zoonosis is a disease that spreads from animals to humans, or vice versa.

She is planning a date with her current boyfriend.