The United States on Monday reported that 70 percent of adults had received at least one dose of the coronavirus vaccine, a benchmark President Biden had hoped to reach nearly a month earlier, on July 4.

The news came as the highly contagious delta variant is driving a coronavirus surge, with the nation reporting more than 85,000 cases a day, according to The Washington Post’s rolling seven-day average. On some recent days, the number of new reported cases has crested 100,000 — a number not seen since February, when vaccines were not widely available.

Biden called on more Americans to get the shot, tweeting Monday afternoon that the nation was “prepared to deal with the surge in COVID-19 cases like never before.”

“Unlike a year ago, we have the ability to save lives and keep our economy growing,” he wrote. “We know we can dramatically lower the cases in the country. We can do this. Get vaccinated.”

The Biden administration on Monday also explicitly threw its support behind the increasing number of employers and universities that, in recent days, have announced they will compel people to be vaccinated to return to work or school.

Jeff Zients, the White House’s coronavirus response coordinator, said the requirement to get immunized against the virus “is a growing trend and makes a lot of sense given that we are going to beat this pandemic by getting more and more people vaccinated.”

Although forecasts are tricky and cannot account for new variants, disease experts predict as many as 140,000 to 300,000 cases a day in the United States come August, likely fueled by the more transmissible delta variant and the widespread resumption of normal activities.

The virus is infecting mostly unvaccinated people, though breakthrough cases in vaccinated people are emerging, too.

For now, the rising case numbers seem to be driving vaccine uptake.

Cyrus Shahpar, White House covid-19 data director, announced on Twitter that the country had hit the 70 percent mark. The seven-day average of newly vaccinated people, 441,000, was the highest in more than a month, he added.

“Let’s continue working to get more eligible vaccinated!” Shahpar wrote.

Here are some significant developments:

  • The surge of cases also reached into Congress, with Sen. Lindsey O. Graham (R-S.C.) testing positive for the coronavirus. Graham recently attended GOP and Senate functions without wearing a mask. In a tweet, Graham, who was vaccinated against the virus in December, described his condition as akin to a sinus infection and said his symptoms are mild.
  • Louisiana issued a statewide indoor mask mandate for people ages 5 and up Monday. Gov. John Bel Edwards (D) said on Twitter that the requirement was because cases and hospitalizations are continuing to rise, “threatening the ability of hospitals to deliver care.”
  • Germany will offer coronavirus booster shots to the elderly and people in high-risk groups in September, the country’s health minister announced Monday. “We want to protect particularly at-risk groups as best as possible in fall and winter,” Health Minister Jens Spahn said in a statement. “The risk of declining vaccination protection is greatest for those people.” Germany also announced it will make coronavirus vaccines available to children over 12.
  • In the United Kingdom, adults over 50 and immunocompromised people will be offered coronavirus booster shots starting in September, according to the Telegraph. Cambodia will give front-line workers a third dose of coronavirus vaccine as a booster shot, mixing regimens between the AstraZeneca vaccine and Chinese Sinopharm and Sinovac shots.

Overall, about 189.9 million people — or 57 percent of the total U.S. population — have received at least one dose of vaccine, according to latest figures from the CDC. About 163.9 million people, or 49 percent of the total U.S. population, have now been fully vaccinated.

The CDC also reported that as of July 26, there were 6,587 coronavirus cases that resulted in hospitalizations or death among fully vaccinated people — including 1,263 deaths — a small fraction of the people fully vaccinated against the disease.

The CDC has not announced the total number of breakthrough cases since April, when it announced more than 10,000 cases among the fully vaccinated. Meanwhile, one recent hot spot was found to be Provincetown, at the tip of Cape Cod, a tourist destination known for its party scene over July Fourth weekend. A scientific analysis published Friday found that three-quarters of the people infected during an outbreak fueled by the delta variant there were fully vaccinated.

Bloomberg News, in its own analysis, looked at data from 35 states and identified 111,748 breakthrough coronavirus cases through the end of July.

Anthony S. Fauci, the White House’s chief medical adviser, warned that more “pain and suffering” were on the horizon during an interview Sunday on ABC’s “This Week.”

“Things are going to get worse,” he said, but added that further lockdowns in the country remained unlikely.

Already the epicenter of the U.S. outbreak, Florida continued to be an area of concern after it broke its own previous record for hospitalizations, on Sunday. The state recorded just over 10,200 people hospitalized with confirmed covid-19 cases, according to data reported to the U.S. Department of Health & Human Services, a day after it recorded its highest one-day total cases since the start of the pandemic.

“I’m deeply concerned about what’s happening in Florida,” Surgeon General Vivek H. Murthy said Monday on “CBS This Morning.”

Over 10 million people have been fully vaccinated in Florida, about 50 percent of the population as of Sunday, according to the Johns Hopkins University vaccine tracker.

Parents are increasingly concerned about possible disruption to the third straight academic year due to the coronavirus pandemic.

Murthy said the virus was constantly throwing “curveballs our way” but added that the “vaccine is saving lives,” predicting that more schools and businesses would introduce vaccine requirements. “We just gotta keep going,” Murthy said.

Some Americans are lamenting their previous reluctance to get a vaccine.

Micheal Freedy, a 39-year-old father of five, died Thursday after contracting the virus and being admitted into intensive care in July. His fiancee, Jessica DuPreez, 37, told The Washington Post that Freedy had not been opposed to vaccination but like many Americans wanted to wait to learn more about how people reacted to the vaccines.

“I should have gotten the damn vaccine,” Freedy texted DuPreez amid his battle with covid-19.

Now bereaved, DuPreez has a simple message for the nation: Get the vaccine.

This sentiment was echoed by Tennessee state Rep. David Byrd (R), who went from attending unmasked gatherings to a harrowing struggle with coronavirus that included 55 days on a ventilator.

He, too, urged Americans to get vaccinated. “It is a disease that wants to kill us,” Byrd, 63, said in a statement, adding that his family had at least once begun planning for his funeral.

Meanwhile, some who have lost loved ones to the virus have been pushing Congress to acknowledge the deaths. They urged financial support for the children of covid-19 victims, research on long-haul cases and, most immediately, a day of national remembrance for the nation’s more than 600,000 fatalities.

But a three-day lobbying blitz in late July didn’t net the longed-for results. The group picked up no new sponsors for the covid memorial day resolution. “You can’t help but be bitter when you look at how many people have died and how little that seems to matter,” said Laura Jackson, whose husband died from the virus. She added: “What’s so hard about saying yes to a day that honors those who died?”

Kate Brady and Stefano Pitrelli contributed to this story.