California became the first state to formally shift to an "endemic" approach to the coronavirus with Gov. Gavin Newsom's announcement Thursday of a plan that emphasizes prevention and quick reaction to outbreaks over mandated masking and business shutdowns. The milestone, nearly two years in the making, envisions a return to a more normal existence with the help of a variety of initiatives and billions in new spending to more quickly spot surges or variants, add health care workers, stockpile tests and push back against false claims and other misinformation.