Chiron Corporation was an American multinational biotechnology firm founded in 1981, based in Emeryville, California, that was acquired by Novartis on April 20, 2006. It had offices and facilities in eighteen countries on five continents. Chiron's business and research was in three main areas: biopharmaceuticals, vaccines, and blood testing. Chiron's vaccines and blood testing units were combined to form Novartis Vaccines and Diagnostics, while Chiron BioPharmaceuticals was integrated into Novartis Pharmaceuticals. In 2014, Novartis completed the sale of its blood transfusion diagnostics unit to Grifols and announced agreements for the sale of its vaccines unit to GlaxoSmithKline.