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Kaiser Permanente health care workers hold signs and chant slogans while on strike in front of the Kaiser Permanente San Diego Medical Center Tuesday, Oct. 14, 2025, in San Diego. (AP Photo/Gregory Bull)

SAN FRANCISCO – An estimated 31,000 registered nurses and other front-line Kaiser Permanente health care workers went on strike Tuesday to demand better wages and staffing from the California-based health care giant.

Organizers say the five-day strike across 500 medical centers and offices in California, Hawaii and Oregon is the largest in the 50-year history of the United Nurses Associations of California/Union of Health Care Professionals. The strike could grow to include 46,000 people.

Those on strike, including pharma

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