| http://www.w3.org/ns/prov#value | - Although preferred, clearly not every monomer/repeat unit need be negatively charged as long as there is sufficient negative charge for the polyanionic polymer of the invention to have the capabilities stated herein, in particular the ability to prevent flocculation between PRP and aluminium hydroxide adjuvant and/or the capability not to significantly desorb antigens beneficially adsorbed to alum
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