As the temperature is higher than the past year, the body's immune system decline, the virus easier to reproduce, coupled with high virulence, so that there is a reason for more severe in children.
由于今年气温比往年高，人体的免疫力下降，而病毒比较容易繁衍再加上病毒毒力较高，所以这也是出现重症患儿较多的一个原因。
Although the body will attempt to produce more CD4 cells, their Numbers will eventually decline and the immune system will stop working.
虽然身体会尝试制作更多CD 4细胞，他们的人数将最终下降和免疫系统将停止工作。
The close interaction is known between decline in functional activity of the immune system and the process of aging.
已知在免疫系统功能活力的低下及老龄化的进过程之间有密切互动关系。
The immune system starts to decline and there are changes in metabolism, lungs, the senses, the brain and the skin.
免疫系统开始下降，有改变，代谢，肺，感官，大脑和皮肤。
The immune system starts to decline and there are changes in metabolism, lungs, the senses, the brain and the skin.
免疫系统开始下降，有改变，代谢，肺，感官，大脑和皮肤。
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