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.