The Newsweek article (which does not mention Grant Achatz) is here, a photo gallery of Oprah shows that offered "risky advice" is here and a podcast on the topic is here.

One of the doctors Oprah has had on her show, OB-GYN Christiane Northrup, advised against vaccinating girls with the HPV vaccine, Gardasil (see #2 in the photo gallery and page 3 of the article).

Leslie

April 2006: Husband dx by dentist with leukoplakia on tongue. Oral surgeon's biopsy 4/28/06: Moderate dysplasia; pathology report warned of possible "skip effect." ENT's excisional biopsy (got it all) 5/31/06: SCC in situ/small bit superficially invasive. Early detection saves lives.