Costco on Friday opened up appointments for Johnson & Johnson’s single-dose COVID-19 vaccine at nearly two dozen stores across the Bay Area, substantially expanding the superstore chain’s vaccination offerings in the region.

Appointments are available to anyone who meets California’s eligibility requirements, including people who are 50 or older, those ages 16-49 with high-risk health conditions or disabilities, people experiencing homelessness and workers in healthcare, food and agriculture, education, public transit and emergency services.

As of 9 a.m. Friday, there were still dozens of open time slots for next week at Costco stores across the region, including in North San Jose, Concord, Fremont, Danville, Livermore and Gilroy.

Although Costco is a members-based enterprise, Californians do not need to be members in order to sign up for an appointment.

“Costco is firmly committed to helping protect the health and safety of our members and employees, and to serving our communities,” the store wrote on its website.

Costco began administering vaccines in mid-February at some of its pharmacies across the country. At that time, it was only offering appointments at one Bay Area store in Novato and appointments were limited to essential health care workers.

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The new appointments released by Costco on Friday come a day after Californians ages 50 became eligible for vaccines across the state and Gov. Gavin Newsom got vaccinated with a Johnson & Johnson COVID-19 shot. On April 15, all Californians 16 and older will be eligible for a vaccine.

To book an appointment through Costco, visit https://www.costco.com/covid-vaccine.html.