The Swiss-based nonprofit says that as European countries roll out their vaccine campaigns, they face opposition from anti-vaccine lobbyists.

VOA: standard.2009.11.25

That concept is called DNA-based vaccine, or DNA vaccines.

这个概念称为以DNA为基础的疫苗,或者DNA疫苗

耶鲁公开课 - 生物医学工程探索课程节选

For hepatitis C vaccine we're learning a lot from in vitro or cell-based methods."

VOA: standard.2010.02.16

European skepticism about the vaccine comes as the Stockholm-based European Center for Disease Control and Prevention reports the number of deaths in Europe due to the H1N1 virus has been doubling every two weeks since mid-October.

VOA: standard.2009.11.25