We talk with an infectious disease specialist about vaccine hesitancy among healthcare workers. Plus, is it a good idea for a fully vaccinated person to get an extra dose of vaccine to boost immunity to the Delta variant? Then, the effort to recall Governor Gavin Newsom is shaping up to be more of a battle than previously thought. Later, dozens of charrerías across the country offer spectators a look at the living history of Mexico’s proud ranching culture. And, the Old Globe Theatre returns to in-person performances with a newly mounted production of the 1967 rock musical “Hair.”