The present invention relates to pharmaceutical suspensions comprising multimeric- multiepitope influenza polypeptides, to processes for their production and to their use as immunizing subjects against influenza. In particular, the invention relates to stable aqueous microparticulate suspensions comprising a multimeric multiepitope polypeptide.La présente invention concerne des suspensions pharmaceutiques comprenant des polypeptides multimères-multi-épitopes de grippe, leurs procédés de production et leur utilisation pour immuniser des sujets contre la grippe. Linvention concerne, en particulier, des suspensions de microparticules aqueuses stables comportant un polypeptide multimère multi-épitope.