https://www.siliconvalley.com/2021/02/20/costco-begins-offering-covid-19-vaccines-in-the-bay-area/

Costco announced Saturday that it would be the latest pharmacy chain to offer coronavirus vaccines to Bay Area residents.

Starting this week, Costco will be administering vaccines, typically from Moderna, at select locations across California, including at one store in Marin County, according to a company statement released Saturday.