1. Dr. FRED BUCKHOLD, SLU Care General Internist at SSM Health Saint Louis University Hospital, and a professor of medicine at St. Louis University School of Medicine.  The CDC warns the latest measles outbreak in the US may threaten our measles elimination status achieved more than two decades ago.  What's going on?  Also, what do we need to know about the bird flu outbreak -- is it safe to drink milk and eat chicken?
2. Dr. YIN CAO, assistant professor of surgery at Washington University School of Medicine and Siteman Cancer Center.  Senior author of a new study just released on accelerated aging in younger Americans possibly leading to increased risk for early onset cancers.  The study finds the biological age of the cells of adults under age 55 -- if born after 1965 -- is much older than their chronological age.  What does that mean?  What are the implications of this finding?  What is the message for younger adults?
3. Dr. SANA SAIF UR REHMAN, Washington University hematologist and director of the new Sickle Cell Treatment Center at Barnes Jewish Hospital.  This is the first of its kind in the St. Louis area - a dedicated adult Sickle Cell Treatment Center. This will allow sickle cell patients faster and easier access to treatment when they are hit with a sickle cell crisis.  How does it work? How big is the Sickle Cell community in the St. Louis area?  Why was this needed?
4. TIFFANI JACKSON, former KMOX Reporter -- is battling sickle cell.  Back in December, she told us about what it is like to live with sickle cell.  Tiffani has now relocated -- per her doctors' advice -- to a warmer climate to alleviate some of her sickle cell pain brought on by cold weather.