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Universal flu vaccine

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Universal flu vaccine

A universal flu vaccine would be a flu vaccine effective against all human-adapted strains of influenza A and influenza B regardless of the virus sub type, or any antigenic drift or antigenic shift.[page needed] Hence it should not require modification from year to year in order to keep up with changes in the influenza virus. As of 2024 no universal flu vaccine had been successfully developed, however several candidate vaccines were in development, with some undergoing early stage clinical trial.

New vaccines against currently circulating influenza variants are required every year due to the diversity of flu viruses and variable efficacy of vaccines to prevent them. A universal vaccine would eliminate the need to create a vaccine for each year's variants. The efficacy of a vaccine refers to the protection against a broad variety of influenza strains. Events such as antigenic shift have created pandemic strains such as the H1N1 outbreak in 2009. The research required every year to isolate a potential popular viral strain and create a vaccine to defend against it is a six-month-long process; during that time the virus can mutate, making the vaccines less effective.

If a universal vaccine can be developed which is both effective and safe, it could be manufactured in quantity and eliminate availability and supply issues of current vaccines.

Centivax, a biotech company, has developed a universal flu vaccine candidate that has shown promise in preclinical studies. The vaccine aims to provide broad protection against various influenza strains by targeting conserved regions of the virus. The company has raised $45 million to advance the vaccine through clinical trials.

Human influenza is principally caused by the Influenza A and Influenza B viruses. Both have similar structure, being enveloped RNA virus. Their protein membrane contains the glycoproteins hemagglutinin (HA) and neuraminidase (NA) which are used by the virus to enter a host cell, and subsequently to release newly manufactured virions from the host cell. Each strain of the influenza virus has a different pattern of glycoproteins; the glycoproteins themselves have variability as well.

In 2008, Acambis announced work on a universal flu vaccine (ACAM-FLU-ATM) based on the less variable M2 protein component of the flu virus shell. See also H5N1 vaccines.

In 2009, the Wistar Institute in Pennsylvania received a patent for using "a variety of peptides" in a flu vaccine, and announced it was seeking a corporate partner.

In 2010, the National Institute of Allergy and Infectious Diseases (NIAID) of the U.S. NIH announced a breakthrough; the effort targets the stem, which mutates less often than the head of the viral HA.

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vaccine that prevents infection from all strains of the flu
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