IntroductionThe EU Rules for Manufacture of Medicinal Products GMP, published in 1989, contained an annex on the manufacture of sterile medicinal products to ensure the sterility of medicinal products. A version of this annex, “Annex 1”, issued according to its document history in May 2003, underwent several targeted updates in the interim period until 2009, but now Annex 1 has undergone, for the first time, a complete revision.