Unaffected (adjective)

1. Not affected by something; not influenced or changed in any way.
2. Not showing emotion; not affected by something emotionally.

Origin:

From un- ("not") + affected, past participle of affect ("to affec.t")

Examples:

1. The news of the disaster left her completely unaffected.
2. His calm and unaffected manner reassured her.
3. The disease is not known to affect him.
4. He remained unaffected by the cold weather.
5. The new law has had no real effect on the industry.