The United States is facing a COVID-19 surge this summer as the more contagious delta variant spreads.
More than 615,000 Americans have died from COVID-19 and over 4.2 million people have died worldwide, according to real-time data compiled by the Center for Systems Science and Engineering at Johns Hopkins University.
Just 58.4% of Americans ages 12 and up are fully vaccinated against COVID-19, according to data from the Centers for Disease Control and Prevention.
The CDC last week, citing new science on the transmissibility of the delta variant, changed its mask guidance to now recommend everyone in areas with substantial or high levels of transmission -- vaccinated or not -- wear a face covering in public, indoor settings.
Here's how the news is developing today. All times Eastern.
Aug 04, 2021, 3:08 PM EDT
Delta variant now 93% of all sequenced cases in US
The delta variant now accounts for 93% of all sequenced cases in the U.S., according to the latest CDC data, which was collected over the last two weeks of July.
Delta accounted for just 3% of cases sequenced in late May.
Across the Midwest, described as HHS regions 7 and 8, delta made up 97% to 98% of cases. This includes Iowa, Kansas, Missouri, Nebraska, Colorado, Montana, North Dakota, South Dakota, Utah and Wyoming.
-ABC News’ Cheyenne Haslett
Aug 04, 2021, 2:55 PM EDT
WHO chief: No booster shots until at least end of September
The World Health Organization is calling for a moratorium on booster shots until more people from low-income countries have received a vaccine.
A paramedic prepares doses of AstraZeneca vaccine for residents at a walk-in COVID-19 clinic in Sydney, Australia, Aug. 4, 2021.
Saeed Khan/AFP via Getty Images
Low-income countries have only been able to administer 1.5 shots for every 100 people due to lack of supply, Dr. Tedros Adhanom Ghebreyesus, WHO Director-General, said Wednesday.
A moratorium on boosters until at least the end of September will "enable at least 10% of the population of every country to be vaccinated," he said.
But White House press secretary Jen Psaki said in response that the U.S. doesn't have to choose.
"We feel that it's a false choice and that we can do both," Psaki said Wednesday.
The U.S. has ordered enough supply for every American to get vaccinated, plus get a booster shot, according to the White House. The U.S. has already pledged to donate 580 million doses to the international community by 2022.
-ABC News’ Sarah Kolinovsky and Zoe Magee
Aug 04, 2021, 2:27 PM EDT
Hospitalizations could more than triple this month
The Centers for Disease Control and Prevention forecasts that daily hospitalizations "will likely increase over the next four weeks."
About 7,000 new COVID-19 patients are hospitalized each day right now. That may soar to 24,000 per day, according to the COVID-19 Forecast Hub at U Mass Amherst.
Aug 04, 2021, 2:11 PM EDT
Fully vaccinated people susceptible to 'long COVID': Fauci
Dr. Anthony Fauci is warning that fully vaccinated people are also susceptible to "long COVID" if they have a breakthrough infection.
"We already know that people who get breakthrough infections and don’t go on to get advanced disease requiring hospitalization, they too are susceptible to long COVID,” Fauci told McClatchy. "You’re not exempt from long COVID if you get a breakthrough infection."
People wait to get the COVID vaccine at a clinic, Aug. 4, 2021 in Ferguson, Missouri.
Spencer Platt/Getty Images
As the delta variant surges, Fauci said, "there could be a variant that’s lingering out there that can push aside delta."
"If another one comes along that has an equally high capability of transmitting but also is much more severe, then we could really be in trouble," he said.
