NEW YORK — New York City has seen a “rapid decline” in new COVID-19 cases within the past month — one of several signs that the five boroughs are “beating back” the omicron variant, Mayor Eric Adams said Sunday.

The city’s case count has fallen by more than 80% since early January, Adams said at a COVID-19 briefing Sunday afternoon. And while the five boroughs lost more than 2,300 people to COVID-19 within the past month, hospitalizations and fatalities have also been on the decline, the mayor said.

“Since our last briefing, all indicators are saying we’re headed in the right direction,” he said. “We have a lot to do, but let’s be clear: We are winning, and the key indicators are showing that we are beating back omicron variant, and we’re doing it in a successful way.”

As of Sunday, 75% of New York City residents were fully vaccinated, the city’s health commissioner, Dr. Dave Chokshi, said at the briefing, calling that figure a “remarkable milestone.”

“If you had asked me a year ago if we’d get to this level, I would have said, ‘It’s my greatest hope, but it would be extremely tough,’” he said.

Now, 85% of adults and 76% of children ages 13 to 17 in the city are fully vaccinated, Chokshi said. The five to 12 age group, however, was still lagging behind as of Sunday, the commissioner said.

“To date, only 36% of children ages five to 12 are fully vaccinated,” he said. “So I urge all parents to extend the protection of vaccination to your kids and consult with your pediatrician on any lingering questions.”

As part of its ongoing efforts to combat the virus, the city is offering free, same-day at-home delivery of oral antiviral pills to treat COVID-19, Adams said at the briefing. New Yorkers who test positive for COVID-19 should contact their doctor or call 212-COVID19 to discuss treatment options, the mayor said in a press release.

“We want to make sure that no one with COVID has to move throughout the city, especially for those who [are] immunocompromised, or our elderly,” he said. “New York is one of the only places in the nation where we are doing this free delivery.”

Adams’ COVID-19 update came hours after Gov. Kathy Hochul told NY1 the state was “absolutely turning the corner” in its fight against the omicron variant.

“Tremendous progress has been made,” she said. “Just literally earlier this month, we had a 23% statewide infection rate. And now, that infection rate is down to about 6.9%.”