Fighting the flu has always been a difficult task, since the virus is constantly mutating and forming new strains.

对抗流感一向是个大难题，因为病毒会不断突变，形成新的种类。

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The FAO and OIE have for some time had a largely unfunded global strategy for fighting avian flu.

食品农业组织和世界动物卫生组织已经在一段时间内在全球开展免费服务，对付禽流感。

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Finding this out might help us find a way of fighting the present H5N1 avian flu virus strain.

弄清这个问题将有助于我们寻找到一条途径去抗击目前的H5N1禽流感病毒株。

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The first step uses a bit of influenza DNA to get the patient's immune system to begin fighting off the flu, and then the protection is given a "boost" some time later by the second step, which can be either another bit of DNA or a conventional flu vaccine.

VOA: standard.2010.07.21

But the MAAC player of the year has been fighting flu-like symptoms throughout the tournament.

WSJ: Iona beats Manhattan to win MAAC tournament title

We also had the chance to visit the flu-fighting "war room" here in Washington where all the assets of government are being coordinated.

CNN: John King: Flu and politics dominate Sunday talk

James Harden scored 31 points and sank seven 3-pointers while fighting flu-like symptoms, and the Rockets beat Oklahoma City 107-100 Wednesday night to pull within 3-2 in their first-round playoff series.

NPR: Durant, Thunder Struggling To Close Out Rockets