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。
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。
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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