> Investigators have concluded that more than half of adults who run a high risk of getting hepatitis B are never vaccinated against the virus. The study tracked specific groups who were more or less likely to get the jab. Report
> Canadian health officials are urging males in the country ages 9 to 26 to get vaccinated against HPV, extending a recommendation already in place for females. Story
> Germany's immatics says it gained positive midstage data for an experimental oncology vaccine targeting colorectal cancer. Release
> Investigators concluded that serious allergic reactions in children are rare after a vaccination. Story
> After fighting whooping cough outbreaks for two decades, California officials say they got through 2011 without a single death. Article