Climate change has raised average temperatures in the Central Highlands region of Kenya, allowing the disease to creep into higher altitude areas where the population has little or no immunity.

气候变化导致肯尼亚中部高地地区平均温度的上升，这使得这种疾病蔓延到高海拔地区。

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Myasthenia gravis(MG) is an autoimmune disease which choline receptor antibody mediates, cell immunity depends on and addiment participates.

重症肌无力是乙酰胆碱受体抗体介导、细胞免疫依赖、补体参与的自身免疫性疾病。

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The presumption has been that smoking renders people vulnerable to disease by impairing lung function or immunity. And it may well do both.

假设是基于抽烟能削弱肺部功能或者免疫力，更可能是两者，从而使人们更容易受到疾病的攻击。

youdao

So,they lack the immunity to fight off the disease.

VOA: standard.2009.09.04

So, you couldn't introduce the live virus in because that would cause the disease not just immunity.

所以 不可以直接接种活体病毒,因为这会使人致病而不仅是引起免疫应答

耶鲁公开课 - 生物医学工程探索课程节选

"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

The HPA also said that children who receive all the necessary doses would build up and keep high levels of immunity to the disease.

BBC: Whooping cough cases increase in England and Wales

Breast-feeding can certainly help provide immune protection against multiple illnesses, but not if a mother does not have immunity to a certain disease such as pertussis.

CNN: Can breast-feeding prevent whooping cough?

The vaccine needs a 95% uptake to achieve the herd immunity needed to ensure the disease cannot take a hold in individuals who are not vaccinated.

BBC: Measles outbreak 'worst in years'