The man who runs the Centers for Disease Control and Prevention disagrees with Vice President Joe Biden about whether it's safe or not to fly during this flu outbreak.

"This is what we call in public health a teachable moment," Dr. Richard Besser just told reporters dialed into his daily conference call.

Asked about Biden's comment today that he "wouldn't go anywhere in confined places now," and specifically not a commercial airplane, Besser said that:

"If you have a fever and flu-like symptoms you should not be getting on an airplane. ... (But),
I think flying is safe. Going on the subway is safe. People should go out and live their lives."