1. Second COVID-19 case of unknown origin confirmed in US  China.org.cn
  2. Another coronavirus case of unknown origin identified in California  The Verge
  3. Coronavirus: 2d US 'community spread' case in Santa Clara County - Business Insider  Business Insider
  4. Leak claims California found second case of ‘unknown origin’ coronavirus  SlashGear
  5. Northern California finds a second case of coronavirus spread through the community  Livescience.com
  6. View Full coverage on Google News

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