Every weekday on KCBS Radio, we're giving you direct access to top experts in various fields.

Today is World AIDS Day, and communities across the globe are gathering to remember those we've lost to the disease and highlight the advancements in research and treatment for people diagnosed with HIV or AIDS.

For more on this, KCBS Radio news anchors Margie Shafer and Eric Thomas spoke with Dr. Matthew Spinelli, assistant professor in the division of HIV, infectious diseases and global medicine at UCSF, in today's Ask An Expert segment.

If you have a question you would like answered, please email us at: askus@kcbsradio.com.