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Live Updates: Health Officials Ask White House to Scale Back Booster Campaign - Barron's

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• Federal health officials have asked the White House to scale back or delay the Covid-19 booster campaign, because the Food and Drug Administration needs more time to assess the safety and efficacy data, The Wall Street Journal reported, citing people familiar with the discussions. Health officials may not be able to clear vaccine boosters by Sept. 20, at least not for the Moderna and Johnson & Johnson vaccines. If one does start, it might only be for the PfizerBioNTech vaccine and limited to higher risk groups such as nursing home residents, healthcare workers and people over 65.

The Biden administration said last month that fully vaccinated Americans 18 and older should get a booster shot starting eight months after their second shot, starting Sept. 20. The White House said it is waiting for the FDA’s full review and clearance, and a recommendation from the CDC’s expert advisory panel to implement its plan developed by the nation’s top doctors. When asked this week if boosters were being recommended prematurely, White House press secretary Jen Psaki said, “This was a recommendation made by our nation’s leading health experts based on mounds and mounds of data.”

• The U.S. has administered another 1.4 million doses of coronavirus vaccines since Thursday, the highest daily total dose number since July 1, Dr. Cyrus Shahpar, White House Covid-19 Data Director tweeted Friday. The total includes 550,000 doses for Americans getting newly vaccinated, and 96,000 additional doses for those already fully vaccinated. More than 175 million Americans are now fully vaccinated (61.9% of those eligible), including 82% of those 65 and older, according to the Centers for Disease Control and Prevention.

• The Mu variant of coronavirus is not an “immediate threat” to the U.S., but public health officials are “keeping a very close eye on it,” Dr. Anthony Fauci said. Although the World Health Organization has designated Mu, a coronavirus variant first documented in Colombia in January 2021 and now in 39 countries, as its newest “variant of interest,” the Centers for Disease Control and Prevention has not named Mu a variant of interest or a variant of concern. Mu, also known as B.1.621, was only 0.2% of U.S. cases sequenced as of Aug. 28, compared with more than 99% for the Delta variant. “It is rarely seen here, but it is not at all even close to being dominant,” said Fauci, director of the National Institute of Allergy and Infectious Diseases. The Mu variant has “a constellation of mutations that suggests that it would evade certain antibodies, not only monoclonal antibodies,” but also those from vaccines and patients who have recovered from coronavirus. “But there isn’t a lot of clinical data to suggest that. It is mostly laboratory, in vitro data,” he said. “But remember, even when you have variants that do diminish, somewhat, the efficacy of a vaccine, the vaccines still are quite effective against variants of that type.” CDC director Dr. Rochelle Walensky also noted its relatively small presence in the U.S. compared with the dominant Delta variant, adding: “We’re watching it carefully.”

• South Korea has confirmed its first three cases of the Mu variant of coronavirus, officials said Friday, the Korea Herald reported. The variant was confirmed in three immigrants from Mexico, the U.S. and Colombia who arrived in May, June and July, respectively, and no locally transmitted cases have been detected yet. The Korea Disease Control and Prevention Agency said it would closely monitor its spread and fatality risk. The Mu variant first identified in Colombia has now been detected in nearly 40 countries, including Peru, Chile and the U.S., compared with 170 for the Delta variant. Mu comprises 39% of sequenced cases in Colombia, and 13% of sequenced cases in Ecuador. The World Health Organization said there have also been Mu outbreaks in Europe.

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