Cells gathered during a Pap test. Those on the left are normal, and those on the right are infected with human papillomavirus. Ed Uthman/Wikimedia Commons hide caption

itoggle caption Ed Uthman/Wikimedia Commons

The C. difficile bacteria causes infections that kill about 14,000 Americans each year, the CDC reports. CDC Public Health Image Library hide caption

itoggle caption CDC Public Health Image Library

Ramon Maldonado-Cardenas grimaces as he gets a flu shot from pharmacy student Khoa Truong during a health fair in Sacramento, Calif., last October. Rich Pedroncelli/AP hide caption

itoggle caption Rich Pedroncelli/AP

The FDA hasn't approved a new weight-loss drug since 1999. In the meantime, Americans' waistlines have continued to grow. M. Spencer Green/AP hide caption

itoggle caption M. Spencer Green/AP

A House panel heard testimony about conscience and religious freedom Thursday from (left) Rev. William E. Lori, Catholic Bishop of Bridgeport, Conn.; Rev. Dr. Matthew C. Harrison, president, The Lutheran Church Missouri Synod; C. Ben Mitchell, Union University; Rabbi Meir Soloveichik, Yeshiva University; and Craig Mitchell, Southwestern Baptist Theological Seminary. Carolyn Kaster/AP hide caption

itoggle caption Carolyn Kaster/AP