In our continuing series looking at the latest medical research and news on COVID-19, Larry Mantle speaks with Dr. Dean Blumberg, professor of medicine and chief of Pediatric Infectious Diseases at UC Davis Children’s Hospital. 

Topics today include: 

• Experts say the U.S. is likely “dramatically undercounting” current COVID cases as states scale back regular reporting. 

  • Coronavirus cases on the rise in L.A. County, prompting concerns for spring break. 
• What we know about the Omicron XE subvariant in California. 
• California removes quarantine requirement for asymptomatic people exposed to COVID. 
• Pfizer says its booster raises antibodies against Omicron in kids 5-11. 
• C.D.C. extends mask mandate on planes, trains until May 3. 
• The city of Philadelphia will reinstate its indoor mask mandate. 

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