So if a normal bird flu virus checked into your nose, chances are it would check out before it had a chance to multiply, mutate and do any damage.

这样，如果你吸入一般的禽流感病毒，多数情况是，在它变异造成危害之前，它已经在你的鼻腔内冻死了。

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Since 2006 all members of staff who deal with patients have had to undergo compulsory blood tests to check whether they have the virus.

自2006年以来，直接接触病人的所有医护人员都必须验血，检查是否感染HIV病毒。

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Did you check for a virus on your system?

你对你的系统做了病毒检查吗？

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There's no known cure for hepatitis B, although the virus can be kept in check with anti-viral medicines.

VOA: standard.2010.07.26

The team's approach, which IAVI Vice President Wayne Koff calls very promising, makes use of a three-step process to teach the immune system to keep the HIV virus in check.

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T-cells is the key to keeping the virus in check.

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It means some delay while they check and allow virus-free material to go through.

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