Interferon beta- 1a fremstilles ved en metode kaldet "rekombinant DNA- teknologi", hvor en celle får indsat et gen (dna) og dermed bliver i stand til at producere interferon beta- 1a.
Interferon beta-1a is produced by a method known as ‘ recombinant DNA technology’: it is made by a cell that has received a gene (DNA), which makes it able to produce interferon beta-1a.