PHOENIX (AP) — More than 6 million COVID-19 vaccine doses have now been administered since becoming available in the state.

Gov. Doug Ducey hailed it as a major milestone Monday and urged Arizona residents to keep the momentum to get vaccinated going.

More than 3.3 million people statewide have received at least the first dose. That is 47.3% of Arizona's vaccine-eligible population. Around 2.9 million are fully vaccinated.

The state is shutting down operations of its mass vaccination sites by June 28. Public health officials cited the vast availability of doses at community health centers, doctors' offices, pharmacies and pop-up clinics.

Meanwhile, the state dashboard Monday reported 374 new cases and no deaths. That brings the total number of cases and deaths to 884,195 and 17,700, respectively.

The number of patients hospitalized for the virus deviated little from the past few days at 560. According to the state, 141 of them were in the ICU.

Pima County on Monday said it will begin offering all three approved vaccines — Pfizer, Moderna and Johnson & Johnson — at its three main health clinics, starting immediately. People were encouraged to make appointments, but the vaccines would be available to anyone walking in, according to a news release.

Mass vaccination clinics in Phoenix, Tucson, Yuma and Flagstaff are winding down as demand has leveled off and vaccines have become more widely available through pharmacies and doctors' offices.

Maricopa County health officials started an education campaign with ads on television, radio, billboards and social media encouraging people to be vaccinated. Public health officials said in a news release that they're trying to each people who are on the fence about getting the vaccine, telling them it's OK to have questions and they should seek answers from trusted sources.