WASHINGTON (AP) - The United States served notice Monday that it will keep existing COVID-19 restrictions on international travel in place for now due to concerns about the surging infection rate because of the delta variant.

It was the latest sign that the White House is having to recalibrate its thinking around the coronavirus pandemic as the more infectious variant surges across the U.S. and a substantial chunk of the population resists vaccination.

It was also a reversal from the sentiment President Joe Biden voiced earlier this month when he said his administration was “in the process” of considering how soon the U.S. could lift the ban on European travel bound for the U.S. after the issue was raised by German Chancellor Angela Merkel during her visit to the White House.

White House press secretary Jen Psaki said the restrictions would continue for now.

“Driven by the delta variant, cases are rising here at home, particularly among those who are unvaccinated, and appears likely to continue in the weeks ahead,” she said.

The rising cases also are causing the administration to take a closer look at policies on wearing masks.

On Monday, the Department of Veterans Affairs became the first major federal agency to require its health care workers to get COVID-19 vaccines. And over the weekend, U.S. health officials acknowledged they’re considering changing the federal government’s recommendations on wearing masks.

The delta variant is a mutated coronavirus that spreads more easily than other versions. It was first detected in India but now has been identified around the world.

Last week, U.S. health officials said the variant accounts for an estimated 83% of U.S. COVID-19 cases, and noted a 32% increase in COVID hospitalizations from the previous week.

The rise in cases has prompted some state and local officials to reinstate masking guidance, even for vaccinated Americans.

The White House follows the Centers for Disease Control and Prevention guidance released in May, which states those who are vaccinated don’t have to wear masks indoors.

But Dr. Anthony Fauci, the nation’s top infectious disease expert, said on CNN’s State of the Union this Sunday that recommending that the vaccinated wear masks is “under active consideration” by the government’s leading public health officials.

“We’re going in the wrong direction,” Fauci said, describing himself as “very frustrated.”

The surge in the delta variant poses a major political challenge for Biden, who called it a “great day” for Americans when the CDC released its relaxed masking guidance in May and on July 4 declared that “the virus is on the run and America is coming back.”

It could also highlight one of the administration’s greatest struggles thus far: The sluggish vaccination rate nationwide. As of Sunday, 69% of American adults had received one vaccination shot, according to the CDC - still slightly below the 70% goal Biden had set for July 4. Sixty percent of Americans have been fully vaccinated.

When asked Monday if he had confidence he could get unvaccinated Americans to get the shot, Biden said, “we have to,” but ignored a follow-up question on how.

Still, it’s clear the administration is taking steps to address the continued impact of the pandemic.

Biden announced Monday that those Americans dealing with so-called “long COVID” - sometimes debilitating side effects caused by the illness that last for months after the initial infection - would have access to disability protections under federal law.

“These conditions can sometimes, sometimes, rise to the level of a disability,” he said, adding they’d have accommodations in schools and workplaces “so they can live their lives in dignity and get the support they need.”

And the CDC advised Americans against travel to the United Kingdom this past Monday given a surge in cases there.

Most of continental Europe has relaxed restrictions on Americans who are fully vaccinated, although the United Kingdom still requires quarantines for most visitors arriving from the U.S. Airlines say, however, that the lack of two-way travel is limiting the number of flights they can offer and seats they can sell.

But the rise and prevalence of COVID-19 variants in Europe, especially the delta mutation, has caused the Biden administration to tread slowly about increasing transatlantic travel.