The current U.S. stockpile of H5N1 flu shots likely won’t offer much protection in the event of a pandemic, vaccine researchers said. By Aria Bendix Wild birds and poultry flocks alike continue to drop dead from the highly pathogenic bird flu that began spreading globally in 2020. Almost 59 million commercial birds have already been culled in the United States. It’s read more Article from NBC News: If bird flu starts to spread among people, existing vaccines may be inadequate, experts say