Kaiser Permanente nurses in California have approved a new contract that boosts pay and improves patient care along with health and safety protections for nurses, a union official said. Registered nurses and nurse practitioners who work at 21 hospitals and 65 clinics across Northern and Central California voted last week to approve the new three-year deal, the California Nurses Association said Monday. About 18,000 Kaiser nurses in the state went on a two-day strike in November, and another walkout was planned for last week but an agreement was reached. California Nurses Association represents the Kaiser nurses. Those workers are part of the National Nurses United organization.