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This Week in San Mateo County Health
Week of November 28, 2022

Preventing Respiratory Infections

With COVID-19, RSV and flu circulating in our area, take steps to prevent these respiratory infections by wearing a high-quality mask indoors, staying up to date on vaccinations, washing your hands, avoiding touching your face, covering coughs, and cleaning surfaces. See County Health’s guidance for these three diseases here.

Updated, Bivalent Boosters

San Mateo County Health offers updated, bivalent boosters, which are effective against both the original strain of the virus and the Omicron variants, at its community clinics. Advance appointments are available on MyTurn, though appointments are not required.

Updated boosters are also available from primary health care providers, such as Kaiser and Sutter, as well as from pharmacies such as Walgreens, CVS, and others.

Eligibility for Updated Boosters

  • Moderna Bivalent Booster is authorized and recommended for those 6 years and older.
  • Pfizer Bivalent Booster is authorized and recommended for those 5 years and older.
  • People cannot get a bivalent booster without first completing at least a primary series. 
  • The bivalent booster recommendation replaces previous booster recommendations.


  • Boosters should be administered at least 2 months after completion of the primary series or the most recent booster dose of the original COVID-19 vaccine.