In addition,the study revealed that minority children had a higher incidence of HIV/AIDS, sexually transmitted diseases, asthma,certain cancers, and even success rates for treatment of kidney and heart diseases.

VOA: standard.2010.04.07

None of these do we have vaccines for, and it's turned out that sexually transmitted diseases for a variety of reasons, we'll come back to later, are particularly difficult to develop vaccines for.

这些病我们都没有疫苗,已经证明,对于性传播疾病,有很多原因使得,我们稍后回来再讲,针对这类疾病的疫苗特别难做出来

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