A stock of Johnson & Johnson vaccine arrives for injections. (Photo: Sgt. Sebastian Rothwyn/New York National Guard)

The city will hold four walk-in Covid-19 vaccination clinics in the first week of May open to anyone 18 and older who lives or works in Cambridge. These are the first Cambridge clinics that don’t require an appointment and offer broad eligibility to get a free Covid-19 shot. The clinics will be held from 10 a.m. to 4 p.m. Saturday at Reservoir Church, 170 Rindge Ave., North Cambridge; from 10 a.m. to 4 p.m. Wednesday and Thursday at CambridgeSide Mall, 100 CambridgeSide Place; and from 9 a.m. to 2 p.m. and 4 to 8 p.m. May 7 at Reservoir Church. 

The clinics will offer the Johnson & Johnson vaccine, which requires one shot. People won’t be asked for insurance, identification or a Social Security number to get the shot. Supply is limited and vaccinations will continue each day until the vaccine runs out. The city announcement advised people with questions about the Johnson & Johnson vaccine, which has been associated with extremely rare blood clots in younger women, to consult their primary care doctor or ask a clinician at the vaccination site. Federal officials have approved the vaccine for all adults but required warnings on the label.

The city’s announcement is here.