Unvaccinated people 11 times more likely to die in COVID-19 delta surge

The unvaccinated were six times more likely to get the virus in August.

The United States has been facing a COVID-19 surge as the more contagious delta variant continues to spread.

More than 722,000 Americans have died from COVID-19 while over 4.8 million people have died from the disease worldwide, according to real-time data compiled by the Center for Systems Science and Engineering at Johns Hopkins University.

Just 66.5% of Americans ages 12 and up are fully vaccinated against COVID-19, according to data from the CDC.


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Philadelphia Marathon requiring in-person participants to be fully vaccinated

All in-person runners must be fully vaccinated two weeks ahead of next month's Philadelphia Marathon, officials announced. Runners with only a negative test won't qualify.

The race is set for Nov. 21.


Daily death average nearly 8 times higher than in mid-July

Although daily deaths have declined by about 17% in the last four weeks, the U.S. is still reporting an average of 1,465 new deaths each day, according to federal data. Over the last four days alone, the U.S. reported another 7,500 confirmed COVID-19 deaths.

The death average is nearly eight times higher than in mid-July when the national average had dropped to a near pandemic low of 192 daily deaths, according to federal data.

But hospitalization admissions have dropped by about 11.4% in the last week, according to federal data.

There are currently about 65,000 COVID-19 patients in U.S. hospitals, down from 104,000 patients in late August.

In the Mountain Region -- Colorado, Montana, North Dakota, South Dakota, Utah and Wyoming -- hospital admissions are steadily trending up, federal data show. In the Northeast, hospital admissions are no longer trending down.

-ABC News' Arielle Mitropoulos


Boston Marathon returns with COVID protocols in place

The Boston Marathon returned with 18,000 runners on Monday following a two-year hiatus.

The field size was reduced by 36% this year while another 28,000 runners participated in the race virtually.

Runners were required to provide proof of vaccination or a negative COVID-19 test. Although masks were not mandated for the 26.2-mile course, face coverings were enforced on participant transportation, as well as for volunteers who interacted with participants.

According to the Boston Marathon Association, 95% of all Boston Marathon volunteers were vaccinated and 100% of Boston Marathon medical volunteers were vaccinated.


US to lift land-border restrictions on Canada, Mexico with proof of vaccination

The U.S. is moving forward to lift restrictions for foreign travelers coming into the country over land-border crossings as long as they have proof of COVID-19 vaccination, according to multiple senior Biden administration officials.

The news follows a decision about two months ago from Canadian authorities to allow vaccinated American travelers to enter by land. It also follows the announcement last month of a vaccine requirement for foreign air travelers coming into the U.S.

Current air travel requirements also include presenting a negative COVID-19 test while land border requirements remain more restrictive for anyone deemed “nonessential.”


The first stage of the land-border changes is expected in early November, the officials said, when travelers deemed "nonessential" will be able to enter the U.S. with proof of vaccination. Nonessential travel, including recreation, family visits and tourism, was previously restricted at all land-border crossings.

All travelers, both essential and nonessential, will be required to have proof of vaccination starting in early January.

Unlike the requirements for air travel, this new set of restrictions does not have a testing component, the officials said.

Customs and Border Protection will enforce the requirements at U.S. land ports of entry where they will ask about vaccination status and refer travelers to a more thorough inspection on a case-by-case basis.

-ABC News' Quinn Owen