The drugstore chains CVS and Walgreens both said Wednesday that they expect to finish delivering the first round of COVID-19 vaccine doses at nursing homes on schedule by January 25.

CVS said it was roughly halfway done as of Tuesday. It is working with 7,822 nursing homes nationwide and had completed nearly 4,000 first-dose clinics.

All told, CVS said it has administered 351,231 vaccines in nursing homes as of Tuesday, including nearly 30,000 in big states like California and Florida.

There are more than 15,000 nursing homes nationally, and the drugstore chains focused first on vaccinating at those locations in part because residents there are more vulnerable and require more care than people staying at other long-term care locations.

CVS and Walgreens also are expanding their vaccine delivery into those other locations, which include assisted living facilities. CVS said it has completed nearly 700 first-dose clinics at those locations and administered more than 26,000 shots.

But the drugstore chain said it was still waiting on eight states — Arizona, Illinois, Indiana, Maryland, Oregon, Pennsylvania, Rhode Island and Wisconsin — to set start dates before it can begin working in those locations.