Leiden, The Netherlands (February 26, 2009) - Dutch biopharmaceutical company Crucell N.V. (Euronext, Nasdaq: CRXL; Swiss Exchange: CRX) announces that the journal Science today published a study showing why Crucell's novel anti-influenza antibody is so effective against such a broad range of influenza virus subtypes. These characteristics make the Crucell antibody CR6261 a potentially revolutionary therapy against seasonal and pandemic flu.