She sent her first tweet just after noon, and already Kathleen Sebelius (@Sebelius) has 2,000-plus followers.
The secretary of U.S. Health and Human Services is the latest federal health official to join Twitter and follows in the footsteps of colleagues Dr. Tom Frieden (@DrFriedenCDC), the director of the U.S. Centers for Disease Control and Prevention, and Dr. Francis Collins (@NIHDirector), director of the National Institutes of Health.