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  1. Apr 19, 2024 · How is the updated COVID vaccine different from the previous one? The bivalent booster, which is no longer available, was introduced in the fall of 2022. It targeted the BA.4 and BA.5 Omicron subvariants and the original SARS-CoV-2 virus. The updated vaccine is monovalent, designed to prevent severe disease from the Omicron XBB.1.5 subvariant.

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    • kathy.katella-cofrancesco@yale.edu
  2. Sep 11, 2023 · September 11, 2023. Today, the U.S. Food and Drug Administration took action approving and authorizing for emergency use updated COVID-19 vaccines formulated to more closely target currently...

  3. May 14, 2024 · The 2023–2024 updated COVID-19 vaccines more closely targets the XBB lineage of the Omicron variant and could restore protection against severe COVID-19 that may have decreased over time. We anticipate the updated vaccines will be better at fighting currently circulating variants.

  4. Sep 13, 2023 · The new boosters are a much closer match to currently circulating variants than prior vaccines, say federal health officials. They're updated versions of the existing Moderna and...

  5. Feb 1, 2024 · New data from CDC show that the updated COVID-19 vaccines were effective against COVID-19 during September 2023 – January 2024, including against variants from the XBB lineage, which is included in the updated vaccine, and JN.1, a new variant that has become dominant in recent weeks. The virus that causes COVID-19 will continue to evolve.

  6. Dec 27, 2023 · Advertisement. What to Know About the New Covid Variants. JN.1 has overtaken HV.1 as the leading variant in the U.S. The latest vaccines provide some protection against each of them....

  7. Jun 25, 2022 · 2024. Pfizer and BioNTech Announce Omicron-Adapted COVID-19 Vaccine Candidates Demonstrate High Immune Response Against Omicron. Saturday, June 25, 2022 - 10:00am. View pdf copy Copy to clipboard Open in tab.

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