But the current swine flu is a new strain to which humans have no immunity and against which existing vaccines offer no protection.

VOA: standard.2009.04.30

Humoral refers to immunity in the blood and it's immunity that's in the blood in the form of antibodies.

体液免疫代表着血液中的免疫机制,血液中的免疫机制是以抗体的形式存在的

耶鲁公开课 - 生物医学工程探索课程节选

And he was right; they got immunity and were protected from smallpox when it affected their community.

他是对的,当天花在周围流行时,他们具备了对天花的免疫力

耶鲁公开课 - 生物医学工程探索课程节选

But he says it is cause for concern because it is a new strain, and people have not built up an immunity to it.

VOA: standard.2009.05.01

You also mentioned vaccines and we're going to talk a lot in the middle part of the course about vaccines and the engineering of immunity.

你们也提到了疫苗,我们会在这学期重点讲它,疫苗以及免疫工程

耶鲁公开课 - 生物医学工程探索课程节选

(Voice) On flu and parenting Web sites, the parties are being debated as a way to gain immunity to more severe versions of the virus that might emerge later.

VOA: standard.2009.12.18

Now we don't need the cow anymore because you could pass it from one person to another, and pass the immunity from one person to another.

由于它可以在人与人之间传播,就不再需要奶牛了,就可以把免疫力在人与人之间传播

耶鲁公开课 - 生物医学工程探索课程节选

However, some human rights groups are calling for a fuller inquiry into the interrogation practices, and have expressed dismay at the president's decision to allow CIA officers immunity from prosecution.

VOA: standard.2009.04.17

Newborns need a vaccination within the first day of life to prevent transmission of the virus from their mothers, and babies need two more doses within the first six months for full immunity.

VOA: standard.2010.07.26

Head of the International Red Cross Federation's Influenza team, Robert Kaufman, says the impact of a novel virus on a community without immunity is not just about the number of illnesses and deaths.

VOA: standard.2009.09.04

What the vaccine would aim to do is achieve that in a much more rapid process rather than losing many people's lives and people experiencing a lot of illness before they develop immunity."

VOA: standard.2010.01.20

"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