This was discussed in the earlier War Room post on the WHO
HHS advances plan to produce 4.8 million H5N1 vaccine doses
News brief May 22, 2024
Response (ASPR) at the US Department of Health and Human Services (HHS) said officials are moving forward with a plan to produce 4.8 million doses of H5N1 avian flu vaccine for pandemic preparedness.
Dawn O'Connell, JD, said health officials have identified a manufacturing line at one of its manufacturing partners for fill-and-finish steps, without disrupting production of seasonal flu vaccine. Currently, the vaccine is in bulk form and will be produced in multidose vials.
She said it takes a couple months to fill and finish the vaccine doses, which would save time in case a vaccine is needed. Federal health officials have said one of two H5N1 candidate vaccine viruses is well matched to the circulating strain.
https://www.cidrap.umn.edu/avian-influenza-bird-flu/hhs-advances-plan-produce-48-million-h5n1-vaccine-doses