Dr. Bray Links

Wednesday, September 24, 2014

Red Flag for Universal Flu Vaccine

The recent flu vaccine research in pigs raises a huge red flag calling into question the validity of this hypothesis, however. After giving piglets an H1N2 vaccine, they were then exposed to the H1N1 virus in circulation during 2009. As reported in the featured article:
“Instead of being protected, the H1N2-vaccinated pigs developed more severe disease than exposed pigs that hadn’t been pre-vaccinated. When the researchers tested the blood of the vaccinated pigs, they found high levels of antibodies that attached to the stalk of the H1N1 hemagglutinin, but not to the head of the protein.
Vincent said she and her colleagues are still trying to figure out why this produces more severe disease. But the theory is that while the stalk antibodies can’t neutralize or kill invading viruses, they do bind to them. And that may actually help the viruses enter the cells and multiply to higher levels—the paper calls them 'fusion enhancing.'”


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