Hepatitis: November 2006 Archives

Dynavax shares rocket on hepatitis B vaccine data

dynavaxSAN FRANCISCO (MarketWatch) -- Dynavax Technologies Corp. shares soared as much as 44% Wednesday to reach their highest level ever after the company said its experimental hepatitis B vaccine protected all of the patients it tested in a late-stage clinical trial.

Shares of the Berkeley, Calif.-based drugmaker (DVAX) were changing hands for $9.96 in afternoon trading, up $2.56 and off an earlier high of $10.66.

Dynavax said that after three doses, its Heplisav vaccine protected 100% of a "difficult-to-immunize" population of adults aged 40 to 70 years compared with GlaxoSmithKline PLC's (GSK) Engerix-B vaccine, which was found to protect 73.1% of such people. In those ranging from 56 to 70 years of age, Heplisav's rate of protection was similarily 100% vs. a 56.1% rate for Engerix-B.