WHO urges all countries to maintain and strengthen AFP surveillance and high population immunity.

世卫组织敦促所有国家保持和加强急性弛缓性麻痹的监测和人群的高免疫率。

youdao

The overriding priority is to urgently stop the WPV3 outbreak, while maintaining high population immunity across west Africa to WPV1.

目前的重中之重就是在西非的野生1型脊灰病毒人群免疫仍维持在较高水平时，紧急阻止野生3型脊灰病毒的暴发流行。

youdao

The rise in cases underlines the urgent need to conduct high-quality immunization campaigns to rapidly boost population immunity levels.

病例的增加强调了迫切需要开展高质量的免疫运动以便迅速增强人群免疫水平。

youdao

The current recommendation is based on unique conditions associated with the existing pandemic, including low levels of population immunity to 2009 H1N1, the potential for health-care personnel to be exposed to H1N1 patients, and other factors, Dimond says.

CNN: STORY HIGHLIGHTS

Yea, that study that actually tested all other conceivable factors, performed a detailed analysis, replicated the analysis among multiple populations and proved conclusively that herd immunity can be conferred in the population if 95% of it is vaccinated.

FORBES: Anti-Vaccine Movement Causes The Worst Whooping Cough Epidemic In 70 Years

Immunity to dengue is low in Singapore's population because of the intensive dengue-carrier controls, "making the population vulnerable to outbreaks, " said Ng Lee Ching, director of the Environmental Health Institute at Singapore's National Environment Agency.

WSJ: Dengue Fever on the Rise in Singapore