It derives from a swine influenza virus but the new strain has been found only in people. No pigs have been confirmed to be sick with it.

这种病毒源自猪流感病毒，但是一种仅仅在人体发现的病毒。没有猪因为该病毒发病。

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Because her condition has worsened, Heather is now being home-schooled in order to limit her contact with children who may be sick with something such as the flu.

因为她的病情已经恶化，Heather现在在家里上学，为了减少她与生病的孩子的接触，比如流感。

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They worry about close contact with others who may be sick.

VOA: special.2009.07.14

Avoid contact with people who appear to be sick.

VOA: special.2009.04.29

Risk pools would be overloaded with sick people whose claims would drive up premiums for everyone, forcing out more and more healthy buyers.

FORBES: The Alternatives To ObamaCare's Individual Mandate

Hospitals will be overrun with sick highly contagious people whom they cannot help and existing patients needing operations, dialysis or help with complicated childbirth will suffer.

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Mr Evans said while nothing could be done about people off sick with flu for example, stress could be tackled.

BBC: 21,000 teaching days lost to stress in Wales in 2009