Timothy Cunningham, 35, works as a commander in the U.S. Public Health Service and has responded to the Ebola virus and the Zika virus outbreaks, the CDC said.
Rick Gates, a former Trump campaign aide and business associate of Paul Manafort, entered the plea in federal court in Washington.
Police psychologists caution that there might be a reason the campus security officer at the high school massacre in Parkland, Florida, failed to act.
Flu vaccines are made months in advance using old-fashioned technology
A female driver was immediately apprehended at 17th and E Streets, the U.S. Secret Service reported on its Twitter feed.