"What we assure is that the technologies that do come on the market are safe and effective, but whether or not they should be used on a given case,a given patient, is a decision that is made by the individual practitioner."

VOA: standard.2010.04.07

And so they're already very safe, very effective vaccines available for many infectious diseases.

所以这些疫苗非常安全有效,常备用来对付各种传染病

耶鲁公开课 - 生物医学工程探索课程节选

Experts say the vaccine is safe and very effective.

VOA: special.2009.05.26

European Union health ministers pledged to pursue an effective and safe vaccine without delay.

VOA: standard.2009.04.30

"It is a very essential conversation, that Israel needs to conduct, among ourselves, of what is justified, what is necessary, what is legal and moral, and what even is effective in order to keep our citizens safe."

VOA: standard.2009.09.09