Such unhealthy conditions led to the spread of disease.

VOA: special.2010.08.25

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

Fukuda notes a pandemic has nothing to do with the severity of the disease, but rather with its geographic spread.

VOA: standard.2009.05.14

Some scientists have said the government should cancel large sporting events and close schools to try to stop the spread of the respiratory disease.

VOA: standard.2009.05.30

But the prime minister also admits that in a country where HIV and AIDS victims are often abandoned by their families, fear of the disease could make it almost impossible to stop its spread.

VOA: standard.2009.04.04

"It just is not a good idea." Swine flu parties are the latest version of chickenpox parties, where parents encourage their kids to share lollipops, spoons or whistles to spread the disease and get immunity.

VOA: standard.2009.12.18

Scientists warn that without an agreement to reduce so-called green house gas emissions, global temperatures will continue to rise, with the catastrophic consequences of extreme weather events, the spread of drought and disease, and the extinction of plant and animal species.

VOA: standard.2009.12.09

(Recording) Toure says civil society groups face many challenges to changing the way the epidemic is spread including finding sustainable financing, integrating the work of anti-tuberculosis campaigns, reducing the stigmatization and discrimination surrounding the disease, improving access for treatment, and boosting efforts to prevent mother-to-child transmission.

VOA: standard.2009.10.21