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58° Clear
- San Mateo, CA (94402)
  Today
  
  Some clouds in the morning will give way to mainly sunny skies for the afternoon. High 81F. Winds NNE at 5 to 10 mph..
  
  Tonight
  
  Clear. Low 53F. Winds W at 5 to 10 mph.
  
  Updated: March 16, 2026 @ 12:43 am
- Full Forecast

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EXPLAINER: What do we know about booster shots for COVID-19?

By CARLA K. JOHNSON AP Medical Writer
Aug 18, 2021

U.S. health officials plan to offer COVID-19 booster shots to vaccinated Americans to shore up their protection amid the surging delta variant…

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EXPLAINER: What do we know about booster shots for COVID-19?

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