Sinovac Biotech Ltd is a fully integrated China-based biopharmaceutical company engaged in the research, development, manufacturing, and commercialization of vaccines for infectious diseases. Its products include vaccines for hepatitis A, hepatitis B, EV-A71, seasonal influenza, H5N1 and H1N1 pandemic influenza, coronavirus, pneumococcus, poliomyelitis, varicella, mumps, and tetanus. The Company generates maximum revenue from Mainland China.