In our continuing series looking at the latest medical research and news on COVID-19, Larry Mantle speaks with Dr. Kimberly Shriner, director of Infectious Disease and Prevention at Huntington Hospital in Pasadena.

Topics today include:

• Vaccine for kids under 5 is delayed after F.D.A. review stalls.
• New C.D.C. data adds to evidence that boosters’ protection against severe COVID-19 plunges after four months.
• Gov. Newsom set to announce new guidance on masks in schools today.
• Biden acknowledges frustration with COVID-19 rules, but says lifting mask mandate is premature.
• New research shows Ebola vaccine used in Central Africa produces lasting antibody response.

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