swab test造句怎么写
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However, standard swab tests have proved unreliable in severe cases, says Kumar, possibly because the viral infection is deep in the lungs rather than in the throat.
NEW DELHI: a simple 20-minute gum swab test could soon tell you whether you are HIV positive or not.
Only one false positive case was recorded with the oral gum swab test, proving 99.7% specificity.
The swab test, which involves taking a mucus sample from the nasal cavity, can distinguish between swine flu (H1N1), A and B strains of the virus.
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