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Alameda County moved to California’s purple tier as COVID-19 cases and test positivity rise

Alameda County Board of Supervisors · May 6, 2026
AI-Generated Content: All content on this page was generated by AI to highlight key points from the meeting. For complete details and context, we recommend watching the full video. so we can fix them.

Summary

County health officer Dr. Moss reported a sharp recent rise in COVID-19 cases and test positivity and said state recalculation moved Alameda County into the purple tier effective 12:01 a.m., which will curtail many indoor activities and prompt updated local guidance.

Dr. Moss, Alameda County’s health officer, told the Board of Supervisors on Nov. 17 that county case counts and test positivity have risen sharply in recent days, reporting 25,872 cumulative cases and 490 deaths as of Nov. 16. He said hospitalization indicators are increasing and that the state placed Alameda County into the purple (most restrictive) tier using more recent data and a shortened assessment window.

"We were on the threshold of the red and purple tier, and given day-over-day…

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