The United States is facing a COVID-19 surge this summer as the more contagious delta variant spreads.
More than 672,000 Americans have died from COVID-19 while over 4.6 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 63.6% of Americans ages 12 and up are fully vaccinated against COVID-19, according to data from the Centers for Disease Control and Prevention.
Here's how the news is developing. All times Eastern.
Sep 16, 2021, 10:47 AM EDT
Booster shots begin in England
Booster shots are now being administered in England.
People walk past a Covid vaccination sign outside a hospital in central London, Sept. 9, 2021. The UK government is expected to announce a decision on Covid vaccination boosters and vaccinations for children aged twelve to fifteen years of age.
ANDY RAIN/EPA-EFE/Shutterstock
Eligible people must be six months out from their last shot and include: adults ages 50 and over; people in residential care homes; frontline health care workers; social workers; people who are immunocompromised; and caregivers for the immunocompromised.
About 4.5 million people will be eligible for a booster in the next few weeks.
-ABC News' Christine Theodorou
Sep 16, 2021, 9:01 AM EDT
Pope Francis discusses vaccine hesitancy
Pope Francis said Wednesday he found it "ironic" that a cardinal who was not vaccinated against COVID-19 had been hospitalized with the virus.
Speaking to reporters on his plane while returning to Rome after visiting Hungary and Slovakia, Francis discussed the hesitancy against COVID-19 vaccines and how it has divided people.
"It's strange because humanity has a friendly relationship with vaccines," the pope said. "As children, we got them for measles, for other things, for polio. All the children were vaccinated, and no one said anything. Then this happened."
Pope Francis speaks with journalists on board an Alitalia aircraft en route from Bratislava back to Rome on Sept. 15, 2021, after a four-day pilgrimage to Hungary and Slovakia.
Tiziana Fabi, Pool via AP
"Even in the College of Cardinals, there are some anti-vaxxers," he added, "and one of them, poor man, is in hospital with the virus. But life is ironic."
Although Francis didn't identify the man by name, it appeared he was referring to American Cardinal Raymond Burke, one of the Catholic church's most outspoken conservatives who eschewed the COVID-19 vaccine and spent days on a ventilator after contracting the virus in August.
Francis noted that everyone in the Vatican, "except for a small group," has been vaccinated against COVID-19.
Sep 16, 2021, 7:17 AM EDT
China says it has vaccinated over 1 billion people
China said Thursday that it has vaccinated more than 1 billion people against COVID-19.
According to the Chinese National Health Commission, 2.16 billion doses of COVID-19 vaccines have been administered in the country so far, fully vaccinating 1.01 billion people. That accounts for more than 70% of China's population.
China's COVID-19 vaccination rate is now among the highest in the world, above the United States and Europe. The inoculation drive, however, only used domestically-made vaccines, including Sinopharm and Sinovac Biotech, both of which were approved for emergency use by the World Health Organization but have faced growing scrutiny that they may not be very effective at curbing the spread of the virus, particularly the new variants.
A medical worker displays a syringe with Sinovac Biotech's COVID-19 vaccine at a health care center in Yantai in eastern China's Shandong province on Jan. 5, 2021.
AFP via Getty Images
Despite chasing zero cases with the strictest of suppression methods, China still suffers the occasional COVID-19 outbreak. A fresh outbreak of the more contagious delta variant has been growing in the southeastern province of Fujian. Chinese authorities said the source of the outbreak there was a father who returned from Singapore in early August and transmitted the virus to his child after quarantining. The father didn't test positive for COVID-19 until 38 days after he had returned to China.
Painting the threat of the virus coming in from abroad, China has no plans to reopen its borders for the foreseeable future. Even the 2022 Winter Olympics in Beijing in February Feb is expected to be held within a very strict bubble that will make the recent Tokyo Games seem lax.
-ABC News' Karson Yiu
Sep 15, 2021, 6:58 PM EDT
NYC health officials investigating cases linked to Labor Day concert
New York City's Heath Department announced Wednesday it is investigating a cluster of COVID-19 cases that were linked to a Labor Day weekend concert.
At least 16 people have been identified as part of the cluster linked to the Electric Zoo music festival on Randall's Island, which is located in the East River, the department said.
KSHMR performs during the 2021 Electric Zoo Festival at Randall's Island in New York, Sept. 5, 2021.
Taylor Hill/Getty Images
Eight people have been also been identified who "though likely exposed prior to attending the concert," were in attendance while potentially contagious, according to the health department.
"Anyone who attended this festival should get tested immediately, regardless of whether or not they have been vaccinated. This is especially urgent if attendees are experiencing symptoms," New York City's health commissioner, Dr. Dave Chokshi, said in a statement.
The concert's organizers had strict rules for entrance.
KSHMR performs onstage during Day 3 of 2021 Electric Zoo Festival at Randall's Island in New York, Sept. 5, 2021.
Zachary Mazur/Getty Images
Attendees had to show proof of vaccination that matched their photo ID. Unvaccinated ticket holders were allowed in if they showed proof of a negative test "no more than 3 days prior to each day of attendance," according to the concert's website.
