While it's hard to imagine your hands as a bacterial homeland, these residents are perfectly normal and are important in maintaining your health.

虽然很难想象你的手是细菌的家园，但这些细菌是非常正常的，同时它们对维护你的身体健康有着重要的作用。

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Swine flu, first uncovered in humans in April, is a new virus transmitted as easily as normal flu, the World Health Organisation says.

猪流感，4月份时第一次在人身上发现，世界卫生组织说，猪流感是一种新的病毒，和正常流感传播一样容易。

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Even among those of normal weight, chronic conditions are prevalent, as nearly 60% of those workers report a continuing health issue.

即使在体重正常的劳动者当中，慢性病也很普遍，近60%的被调查者说自己有长期健康问题。

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The failure of smoking prevention and treatment in this group is largely down to an acceptance of smoking as a "normal behaviour" and is an indictment on public health and clinical services, it said.

BBC: NHS 'ignoring smoking in mental health patients'

Moreover, a second British study, led by Martin Deahl of St Bartholomew's Hospital in London, concluded that, in the case of British soldiers returning from Bosnia, those who received no counselling were twice as likely to develop problems with alcohol compared with those who were simply given a normal health check.

ECONOMIST: When horror strikes, does counselling help?