BEIJING, Sept. 12 /Xinhua-PRNewswire/ -- Sinovac Biotech Ltd. (Sinovac) (Amex: SVA - News) today released its semi-annual report. Sales for the six months ended June 30, 2006 increased by 73.3% over the prior year due to stronger sales of its existing hepatitis A vaccine, augmented by the launch of the Company’s Bilive (TM) combined hepatitis A and B vaccine. Gross margin increased to 76.25% from 68.03% due to manufacturing and packaging efficiencies. The loss for the period decreased to $970,000 from $3,466,000 in the comparative period, reflecting both increased revenues and decreased operating expenses. Full particulars of the Company’s results of operations and financial condition are provided in the Company’s Report on Form 6-K which has been filed with the United States Securities and Exchange Commission. Some of the highlights are set out below.