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

Today’s topics include: 

• In an Israeli study, a 4th vaccine dose shows limited results with Omicron. 
• L.A. County logs nearly tenfold increase in coronavirus cases in a month. 
• California throws more money at COVID-19 contact tracing, but is it too late? 
• New federal website to order free COVID-19 tests launches. 
• For coronavirus testing, the nose may not always be best. 
• This is what long-term immunity to COVID-19 might look like. 
• With COVID-19, we’ll never have a normal flu season again. 
• Greece begins monthly fines for unvaccinated people 60 and older. 

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