In our continuing series looking at the latest medical research and news on COVID-19, Larry Mantle speaks with Dr. Paul Adamson, infectious diseases physician and assistant clinical professor at the David Geffen School of Medicine at UCLA.

Topics today include:

• The C.D.C. is expected to loosen masking guidelines on Friday

• L.A. County to lift indoor mask mandate for vaccinated people on Friday 

  • L.A. Unified drops outdoor mask mandate 

• The U.S. mask mandate for air travel will expire next month, but some flight attendants say it’s too soon 
• A new COVID vaccine shows 100% efficacy against severe disease and hospitalizations, its maker says 
• Yes, millions of Americans have caught Omicron. No, we don’t have herd immunity 

• Who might benefit from a fourth shot – and who might not 

  • Got a COVID booster? You probably won’t need another for a long time 

• How Long COVID exhausts the body 

  • How long does Long Covid last?

This program is made possible in part by the Corporation for Public Broadcasting, a private corporation funded by the American people.