Sinovac Biotech Ltd. (Sinovac), is a holding company. The Company is an integrated China-based biopharmaceutical company that focuses on the research, development, manufacturing and commercialization of vaccines that protect against human infectious diseases, including hepatitis A, hepatitis A and B, seasonal influenza, H5N1 and H1N1 pandemic influenza and mumps, as well as animal rabies vaccine. The Company�s product pipeline also includes human vaccines against rotavirus, and human rabies that are in pre-clinical development. The Company specializes in the sales, marketing, manufacturing, and development of vaccines for infectious disease with unmet medical need. The Company�s pipeline consists of vaccine candidates in the clinical and pre-clinical development phases in China, including the EV71 vaccine and human vaccines for pneumococcal, rotavirus, rabies, varicella and rubella.