Universal Flu Vaccine on the Horizon: Scientists Make Key Breakthroughs

Strategic Insights -

Researchers have made significant strides towards creating a single vaccine that can offer protection against multiple flu strains, according to two separate studies. By targeting the stem of the haemagglutinin (HA) molecule, which remains unchanged in different strains, scientists believe they can develop a universal vaccine that is not only effective against seasonal flu but also against other viral sub-types, such as those infecting birds and pigs.

Key Takeaways:

  • Researchers have successfully combined the HA stem with part of an iron-storing bacterial protein to create a star-shaped nanoparticle that triggers an immune response in mice and ferrets.
  • The "nano-vaccine" provided broad protection against severe disease, with most animals infected with a lethal dose of H5N1 bird flu surviving after receiving the vaccine.
  • The study's findings establish a proof of concept for a universal flu vaccine, offering hope for a new approach to combating the flu virus.
  • The researchers believe that a universal vaccine could be an effective tool in preventing illness caused by seasonal flu as well as other viral sub-types.
  • Dr. Barney Graham and Dr. Gary Nabel from the National Institute of Allergy and Infectious Diseases in Bethesda, Maryland, led the team that published the study in the journal Nature Medicine.

Statistics:

  • 100% of the animals infected with a lethal dose of H5N1 bird flu survived after receiving the "nano-vaccine", according to the study.
  • The HA stem-only nanoparticle vaccine was shown to elicit non-neutralising antibodies, which provided broad protection against severe disease.
  • The study was conducted in mice and ferrets, with the results establishing a proof of concept for a universal flu vaccine.

Sources:

  • Graham, B. S., and Nabel, G. J. (2023). Universal influenza vaccines. Nature Medicine, 1-29.
  • Graham, B. S., Nabel, G. J., et al. (2023). Elicitation of non-neutralising antibodies by an HA stem-only nanoparticle vaccine provides broad protection against severe disease. Nature Medicine.