CHICAGO, Nov 28 (Reuters) - Dynavax Technologies Corp. <DVAX.O> on Tuesday said its investigational vaccine for Hepatitis B met its goal of providing better protection against the virus compared to a rival vaccine, pushing shares up 31 percent in after-hours trade.
The company said its late-stage trial found its vaccine, called Heplisav, provided protection against the virus in 100 percent of subjects, compared with 73.1 percent of subjects receiving another vaccine called Engerix-B, made by GlaxoSmithKline Plc <GSK.L>.
Dynavax said the results of the 400-person trial were statistically significant.