The vaccine, the company said, may not have gone through advanced enough testing to qualify for the new pot of U.S. funding. Federal officials, some of whom have become concerned about the leadership of the next-generation vaccine program, acknowledged that key questions remain about how the program will operate and how quickly it can deliver. Although some Biden administration officials hope to roll out new vaccine technology by fall 2024, many scientists believe doses are at least several years away. “There’s not the money, there’s not the infrastructure, there’s not the support,” John Moore, a virologist at Weill Cornell Medicine, said of the push for improved vaccines. “So I’m not expecting any next-generation major things in the near future.”

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Persons: “ There’s, there’s, ” John Moore, I’m, ” Organizations: Biden, Weill Cornell Medicine Locations: Pennsylvania, India