美国Novartis Chiron
Chiron和欧洲制药公司赛诺菲安万特一直是美国市场流感疫苗的主要供应商。该公司主要从事HIV和HCV诊断技术的研究。  2006年诺华制药(NVS)同意以51亿美元，即每股45美元收购其所未拥有的Chiron Corp.(CHIR)的余下的58%的股权。
Preventing tranfusion-transmitted infection is what Chiron is all about. As the world leader in blood safety for the transfusion industry, we develop novel tools, products and services to protect the global blood supply.

Chiron is the blood screening business of Novartis Vaccines and Diagnostics, a division of Novartis AG that was created in 2006 following the acquisition of Novartis Vaccines and Diagnostics.