Swine flu is back, and the first vaccines against the H1N1 virus will soon be on their way.
What do you want to know about swine flu?
But how's the flu pandemic shaping up as fall returns to the Northern Hemisphere? What's the difference between the sprayed and injected vaccines? Who should get immunized first and who can wait?
We'll tackle questions like those in an online chat at noon eastern time on Monday, Oct. 5. Bookmark this post and come back here then with the questions you want answered.
NPR's swine flu czar Richard Knox will be on hand after a morning segment on Morning Edition that will feature a few questions and answers.
We'll be joined by Dr. Richard Wenzel, professor and chair of internal medicine at the Medical College of Virginia, Virginia Commonwealth University, in Richmond.
Wenzel is the immediate past president of the International Society for Infectious Diseases. He traveled to Mexico to study swine flu at the height of the spring epidemic and returned there twice afterward.
He's also stalked swine flu further south, visiting four South American countries during the height of their winter flu seasons to look for insights into what might be coming our way.