Total revenues were $2.7 million and $5.0 million for the three and six months ended June 30, 2012, respectively, compared to $7.3 million and $9.0 million, respectively, reported for the same periods of 2011. Revenues for the second quarter and first half of 2011 included a $6 million milestone earned under the Company's collaboration with GlaxoSmithKline.

Research and development expenses were $11.4 million and $23.8 million for the three and six months ended June 30, 2012, respectively. This compared to $13.3 million and $27.9 million, respectively, reported for the same periods of 2011. Research and development expenses decreased primarily due to the significant decline in clinical activities for HEPLISAV^TM.

General and administrative expenses were $6.0 million and $11.8 million for the second quarter and first half of 2012, respectively, compared to $4.1 million and $8.8 million, respectively, in the same periods of the prior year. General and administrative expenses increased primarily due to growth in commercial development expenses.

HEPLISAV is an investigational adult hepatitis B vaccine for which a U.S. BLA has been accepted for review by the FDA and a Marketing Authorization Application (MAA) has been submitted. In Phase 3 trials, HEPLISAV demonstrated higher and earlier protection with fewer doses than currently licensed vaccines. Dynavax has worldwide commercial rights to HEPLISAV. HEPLISAV combines hepatitis B surface antigen with a proprietary Toll-like Receptor 9 agonist known to enhance the immune response.