Sunday on PBS News Weekend, the messy rollout of the new COVID shot and what you need to know about protecting yourself this fall. As e-bikes explode in popularity, why their introduction hasn't been the smoothest ride. The complicated and shifting definitions of Hispanic and Latino identities. Plus, the story of a Mexican American journalist and activist who devoted her life to fighting racism. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders