Your doubt is misplaced.. At least at the high end. Pap smears have a false negative rate of ~20% and a false positive rate of ~10%. Many doctors are now recommending less frequent tests;<p><a href="http:&#x2F;&#x2F;www.wsj.com&#x2F;articles&#x2F;SB125875596169058039" rel="nofollow">http:&#x2F;&#x2F;www.wsj.com&#x2F;articles&#x2F;SB125875596169058039</a>