内容摘要：“For many Americans we simply do not know the answer as to whether or not they should be getting the seventh or eighth or ninth or tenth COVID-19 booster,” said Prasad, who joined the FDA earlier this month. He previously spent more than a decade in academia, frequently criticizing the FDA’s handling of drug and vaccine approvals.

“For many Americans we simply do not know the answer as to whether or not they should be getting the seventh or eighth or ninth or tenth COVID-19 booster,” said Prasad, who joined the FDA earlier this month. He previously spent more than a decade in academia, frequently criticizing the FDA’s handling of drug and vaccine approvals.

Transplant surgeons who’ve retrieved organs on Revivicor’s farm “go, ‘Oh my god that’s the most beautiful kidney I’ve ever seen,’” Ayares added. “Same thing when they get the heart, a pink healthy happy heart from a young animal.”PIgs stand in pens at the Revivicor research farm near Blacksburg, Va., on May 29, 2024, where organs are retrieved for animal-to-human transplant experiments. (AP Photo/Shelby Lum)

PIgs stand in pens at the Revivicor research farm near Blacksburg, Va., on May 29, 2024, where organs are retrieved for animal-to-human transplant experiments. (AP Photo/Shelby Lum)The main challenges: how to avoid rejection and whether the animals might carry some unknownThe process starts with modifying genes in pig skin cells in a lab. Revivicor initially deleted a gene that produces a sugar named

, which triggers immediate destruction from the human immune system. Next came three-gene “knockouts,” to remove other immune-triggering red flags. Now the company is focusing on 10 gene edits — deleted pig genes and added human ones that together lessen risk of rejection and blood clots plus limit organ size.They clone pigs with those alterations, similar to how Dolly the sheep was created.

Twice a week, slaughterhouses ship Revivicor hundreds of eggs retrieved from sow ovaries. Working in the dark with the light-sensitive eggs, scientists peer through a microscope while suctioning out the maternal DNA. Then they slip in the genetic modifications.

A worker at United Therapeutics’ designated pathogen-free facility in Christiansburg, Va., on May 29, 2024 retrives a UV sterilized item from behind a protected barrier within the facility. (AP Photo/Shelby Lum)“Saturated fat in dairy has not been linked to any adverse health outcomes,” Mozaffarian said.

The pending bills in Congress stipulate that milk fat would not be considered as part of the saturated fat limits required in school meals. That’s because the saturated fatty acids in dairy have a different composition than beef fat, Mozaffarian said, adding that dairy has other beneficial compounds that could offset theoretical harms.In addition, Mozaffarian noted current USDA guidelines ban whole milk but allow skim and low-fat chocolate and other flavored milk sweetened with added sugars. Last year, the USDA agreed to

in school foods for the first time.Dairy industry advocates say participation in school meals programs and consumption of milk have declined since whole milk was removed.