Influenza (flu) among health care personnel (HCP) can result in medical visits and lost work days for the HCP and can spread flu to their patients. Patients with chronic medical conditions, pregnant women, young children, and older people are at higher risk of serious flu complications. CDC analyzed data from an Internet panel survey conducted from October 30-November 15, 2013, among HCP. The results of this survey provide information for use in vaccination campaigns during National Influenza Vaccination Week (December 8-14, 2013). This report provides early flu season (early November) estimates of vaccination coverage among HCP. Final 2013-14 flu season HCP vaccination coverage estimates will be available after the end of the season.