The swine flu at the moment appears to cause a mild illness, whereas the flu strains that arrive in the winter can kill thousands of elderly and vulnerable people.
但事实上，目前传播的猪流感并不致命，相反普通流感在冬季的爆发则可能导致成千上万的老年人和体质虚弱的人的死亡。
A well-maintained swimming pool uses the appropriate amount of chlorine and other disinfectants to kill bacteria which cause illness, explained Dr.
一个保养得好的游泳池会用足够剂量的氯和其他消毒剂来杀灭致病菌，纽约大学兰格恩医学中心的临床微生物免疫学主任，Philip J.
If it spreads to the blood, it can cause a severe illness that can kill the very young, the very old and those with damaged immune systems such as AIDS or cancer patients.
如果沙门氏菌扩散到血液，可以导致婴幼儿，老年人以及免疫系统受损者(如aids和癌症患者)发生严重的疾病，以至死亡。
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