Dr. Tom Shimabukuro heads the CDC’s Immunization Safety Office... Records from a top official at the Centers for Disease Control and Prevention are missing, the CDC’s parent agency has informed a U.S. senator. Department of Health and Human Services (HHS) officials told Sen. Ron Johnson (R-Wis.) in March that “they are having difficulty locating records,” Johnson said on April 9. More recently, HHS officials said that Dr. Tom Shimabukuro’s records “remain lost and, potentially, removed from HHS’s email system altogether,” Johnson added.