“Recombinant” means that the product is made in a laboratory. Recombinant factor products were developed in the 1990s after thousands of people with hemophilia contracted Hepatitis C or were infected with HIV through contaminated factor products derived from human blood or plasma.
Before recombinant products were developed, the only treatments available to manage bleeding disorders were derived from the human blood supply, which carries a risk of blood-borne viruses or pathogens.