The Arizona Department of Health Services and partners began COVID-19 vaccinations Monday at a second state-run site at Phoenix Municipal Stadium, although operations are starting slow because of limited vaccine supply.

Phoenix Municipal Stadium for now will provide about 500 shots a day, but more available doses would allow the administration of 10,000 to 12,000 vaccines at the site daily, state health director Dr. Cara Christ said.

Christ marked the opening by administering second dose vaccines to a handful of educators and state troopers who got their first doses three weeks ago at the opening of the state’s 24/7 drive-thru site at State Farm Stadium in Glendale.

February appointments for both state-run sites opened Jan. 19 and were booked by the end of the day. Christ has said more appointments will become available as the state receives more doses. More than 100,000 doses have been administered at the Glendale site in three weeks.

State officials hope to replicate the sites elsewhere, including in rural and tribal communities. There are also plans to allocate vaccine to more pharmacies, doctors' offices and community health centers as doses arrive in the state.

Arizona State University is lending its stadium grounds near the Phoenix Zoo and is overseeing staffing, logistics and operations at both state-run sites.

ASU President Michael Crow said vaccinations are one key tool in a long-term process to beat back the virus, which will require everyone to work together.

"This is an all-in, everyone-level thing," Crow said. "If you're not wearing a mask, it means you don't really care about the other people that are around you, period, end of conversation. If you're not getting vaccinated, that means that you're not concerned about whether or not you're going to actually die from this virus."

As of Monday, Arizona had administered about 671,500 total vaccine doses. The goal is 3.5 million people (nearly half of Arizona's population) vaccinated by July 1, according to Arizona Department of Emergency and Military Affairs director Major General Michael McGuire.

Alexandra Navrotsky, 77, an ASU professor and director of the Center for Materials of the Universe, got her second shot at the stadium site Monday.

"I'm very happy because it's also a passport to being a little bit freer," she said. "Obviously I'll mask, I'll distance, but really since Thanksgiving I've been pretty much a recluse, trying to avoid people because there's so much virus around."

Other partners facilitating vaccination at the site include the Arizona Diamondbacks, Arizona Complete Health and Walmart.

State officials hope to ramp up distribution at Phoenix Municipal and State Farm stadiums as well as allocating doses to a wide variety of partners and locations statewide.

The Phoenix Municipal Stadium site will initially run seven days a week between 7 a.m. and 5 p.m., unlike the 24/7 State Farm Stadium site. It can be scaled up when more vaccine is available.

But when that happens depends on how many doses the state receives.

Gov. Doug Ducey said Sunday on CNN that Arizona is "in danger of running out of the vaccines we have. All we can do is distribute what we receive from the federal government and from the private sector."

He said although Phoenix Municipal Stadium could do 12,000 vaccinations per day, it's only doing 500 "because of the lack of inventory that we have.

"So, we need more. And we're asking everyone to hustle it up because we want to get that vaccine in people's arms. That's the solution that presents itself. And Arizona wants to do the best job possible in getting it done," Ducey said.

President Joe Biden has promised states a continual three-week window of what their upcoming allocations will look like so states can plan ahead.

"We have not been given our three-week forecast," Christ said Monday. "We’re waiting for that, but what we're assuming is that the amount we got this week is probably stable over the next couple of weeks."

The state expects to receive 160,000 to 170,000 additional doses this week and has been advocating for more vaccine from the federal level, she said.

"What we've been told is they think it's a pretty steady supply for the next couple of weeks and then we'll start to see increases with significant increases weeks after that, Christ said. "There's a lot on the horizon. We know that both Moderna and Pfizer are increasing their production, so that will help as more doses get introduced into the market, but then as new manufacturers bring on new vaccine, that will just add more capacity."

That will allow for more vaccination sites, state officials say.

"Right now, we're focusing on building these mass vaccination sites to get as many Arizonans through as we can. The next phase that we're going to be looking at is smaller sites in communities where people who may not have access to a car can walk up, have it closer. We will also be getting it out to more pharmacies, more doctors' offices, community health centers, so people can also go where they're comfortable receiving their health care," Christ said.

"We're hoping to be able to open up appointments sooner rather than later, but it's really going to depend on what we find (about statewide administration) and what the supply looks like coming in."

In addition to registration at the state-run sites, many counties have their own registration processes and are in varied priority phases. Information is available at azhealth.gov/findvaccine and on county health department websites.