Like indigenous groups and poor communities around the world, Australia's Aborigines are considered to be more vulnerable to the H1N1 flu than other groups because they suffer higher rates of chronic disease.

VOA: standard.2009.07.24

Some people in the population are more biologically vulnerable than others, and the Pimas appear to be one of those groups.

人群中有一些群体,在生物学上处于弱势,皮玛族就是其中之一

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But experts say they are encouraged that the virus seems to be hitting hardest among people of middle age, sparing the more vulnerable groups - the elderly and children under the age of five.

VOA: standard.2009.04.28

"And,high food prices and fuel prices, as well as drought have had a severe impact on the most vulnerable groups in Afghanistan, many of whom are also living in very poor and inadequate housing.

VOA: standard.2009.09.13