There are many different strains of flu virus.

有许多不同类型的流感病毒。

Anyone, once tested positive for H7N9 flu virus, will receive free medical treatment from our government.

任何人一旦被检测出感染H7N9禽流感病毒，都将得到政府资助的免费治疗。

Anyone, once being tested positive for H7N9 flu virus, will receive free medical treatment from our government.

任何人一旦被检测出H7N9禽流感病毒，都将接受政府提供的免费医疗服务。

Researchers discover that the swine flu virus binds far deeper in the lungs than ordinary flu, possibly explaining why it is sometimes fatal.

研究者发现，猪流感病毒比普通流感在肺更深部结合，这可以解释为什么它有时是致命的原因。

There is a new flu virus going around.

一种新的流感病毒在四处流传。