unaffected

1. Not affected or changed.

   Since I work from home, I was unaffected by the office move.

2. Lacking pretense or affectation; natural.
   • 1812, Jane Austen, chapter 3, in Pride and Prejudice‎^{[http://etext.virginia.edu/etcbin/ot2www-pubeng?specfile=/texts/english/modeng/publicsearch/modengpub.o2w&act=surround&offset=80666576&tag=Austen,+Jane:+Pride+and+Prejudice,+1796-1812&query=unaffected&id=AusPrid]}:

     Mr. Bingley was good-looking and gentlemanlike; he had a pleasant countenance, and easy, unaffected manners.

unaffected (plural unaffecteds)

1. Someone not affected, as by a disease.

• nonaffected (less common)

1. Simple past tense and past participle of unaffect