This is some reference information to add to this site's information about the squalene adjuvants in vaccines, including the H1N1 "swine flu" vaccine. Namely, that this squalene is harvested from shark livers and could impact total shark numbers as the demand for squalene increases.More commonly found in beauty products such as skin creams, squalene can be used to make an adjuvant, a compound that boosts the body's immune response.
The World Health Organization recommends adjuvant-based vaccines, because they allow drug makers to create doses that use less of the active component, increasing available supplies.
Olive oil, wheat germ oil, and rice bran oil also naturally contain squalene, albeit in smaller amounts. But for now squalene is primarily harvested from sharks caught by commercial fishers, especially deepwater species.
Source: National Geographic
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