Protests against mandated COVID-19 vaccines pop up across US
Pushback is happening over vaccine requirements and mask mandates.
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.
Latest headlines:
Tokyo sees 4,515 new positive cases
There are 4,515 new positive coronavirus cases in Tokyo as of Friday, according to the city's COVID-19 information website.
It's a 152.7% increase since last Friday.
Of the new cases, 141 are severe and four have turned fatal.
There are now 387 positive cases at the Tokyo Olympics
As of Friday, there are 387 positive COVID-19 cases at the Tokyo Olympics, according to the Tokyo 2020 coronavirus positive case list.
This is an increase of 29 positive cases since Thursday.
All of the cases are either Tokyo 2020 contractors, Games-concerned personnel or media.
"Of the 726 U.S. Olympic delegates in Japan on Aug. 5, no COVID tests were confirmed positive based on daily results," the International Olympic Committee tweeted.
Hawaii issues vaccine rules for state, county employees
Hawaii Gov. David Ige announced Thursday that all state and county employees must show proof of COVID-19 vaccination by Aug. 16 -- or be subject to weekly testing.
Those who don’t comply "could be subject to termination," Ige said.
It is unclear how many state and county workers are already vaccinated.
The mandate comes as the number of cases and hospitalizations in the state are "trending up dramatically," Ige said.
Maryland and Virginia announced similar measures earlier Thursday.
Delta 'sweeping over Mississippi like a tsunami': Official
Mississippi is facing "a phenomenal increase in daily reported cases of COVID, and this is entirely attributable to the delta variant, which is sweeping over Mississippi like a tsunami," state health officer Dr. Thomas Dobbs said Thursday.
Dobbs said 97% of new cases are among the unvaccinated, and that 89% of hospitalizations and 85% of deaths are unvaccinated.
Dobbs pleaded with the public to get vaccinated, stressing that the unvaccinated population is driving the current surge, but that vulnerable, vaccinated people are suffering the fallout.
"There is going to be some collateral damage, unfortunately, even folks who've done everything they can to protect themselves," Dobbs said.
"The minority of folks who are vaccinated and hospitalized are overrepresented by the older and those with weaker immune system, so we're seeing a pretty dramatic spillover effect from the transmission in the community to more vulnerable parts of our population," he said.
-ABC News' Soorin Kim
Single-shot J&J vaccine effective against delta and beta variants: Study
A real-world study of South African health care workers found that the single-shot Johnson & Johnson vaccine was highly effective against the delta and beta variants, according to the South African Medical Research Council, which presented the results Friday.
The vaccine was between 91% and 96% effective against death, according the study, which included more than 477,000 health care workers. J&J showed stronger protection against the delta variant, now dominant in the United States and South Africa, than it showed against the beta variant.
"The data reported today by South African investigators show that a single shot can protect against death due to COVID-19 in the most challenging epidemiologic setting: A massive delta surge in Africa," said Dr. Dan Barouch, director of the Center for Virology and Vaccine Research at Beth Israel Deaconess Medical Center, who helped invent the J&J shot but was not directly involved in the South Africa study.
While the results have not yet been published in a peer-reviewed journal, they may serve as a reassuring data point as the delta variant sweeps the U.S.
Glenda Gray, president and CEO of the South African Medical Research Council, who led the study, said at the Friday press conference that the J&J vaccine showed good durability, an indication that there's no need for booster shots just yet.
-ABC News' Sony Salzman.