California is expanding vaccine eligibility to anyone 50 and over starting April 1, and anyone 16 and up on April 15. Plus, San Diego Unified students will return to campus either two or four days a week in April, depending on the number of families who want to participate in in-person instruction. And in San Diego weekend arts: SDMA’s Young Art exhibition, a virtual piano concert, Coronado Playhouse’s latest production, The Black Iris Project, “Contralto” and “A Shimmer of Strings.”