One can stop spread of disease through a community without being 100% effective in each person who gets the vaccine.

疫苗能够遏制疾病在整个社区中传播,虽然对于每个人来说它并非百分之百有效

耶鲁公开课 - 生物医学工程探索课程节选

The Future Foundation report, for Nicorette, predicts that smoking will decline due to developments such as more effective stop smoking aids, increased legislation to reform smoking behaviour and lawsuits against tobacco companies forcing them out of business.

BBC: NEWS | Health | Thousands prepare to quit smoking

The campaign group is also asking politicians seek more effective alternatives to stop the spread of bovine TB.

BBC: Campaigners seek badger no-cull zone on council land

"There is no evidence that Mr. Loomis took any effective action to stop these practices, " the NFL said.

WSJ: NFL Alleges New Oreleans Saints Issued Bounties on Foes