The document summarizes presentations from a 4th Merial Forum discussing control of PCVD and swine influenza. Topics included the consequences of antibiotic use in Europe, limiting antibiotic use in Denmark, designing effective PCV2 vaccination programs, basics of porcine immunology, impact of PCV2 on sows, antibody status of gilts, viral reproductive disorders, benefits of CIRCOVAC vaccination programs in Hungary and Bulgaria, focusing on subclinical PCVD forms, successful CIRCOVAC piglet vaccination in Spain, designing optimal PCV2 vaccination programs, differences between influenza in humans and pigs, influenza epidemiology and control through vaccination in Europe and humans, swine influenza epidemiology in Europe, GRI