The current vaccines have four viruses: two influenza A, and two influenza B. And it may or may not work.

两种甲型流感和两种乙型流感。它可能起作用，也可能不起作用。

She was diagnosed with influenza A — and says she was shocked.

她被诊断出患有甲型流感——她说她很震惊。

A rapid nucleic acid amplification test (NAAT) for influenza A and B was negative.

甲型和乙型流感的快速核酸扩增试验 (NAAT) 呈阴性。

The enteric tracts of waterfowl such as ducks and geese are known to be the reservoirs for all known influenza A viruses.

已知鸭子和鹅等水禽的肠道是所有已知A型流感病毒的宿主。

Flu diagnoses take some by surprise, and there are two different kinds you need to understand: influenza A and influenza B. Other people get diagnosed with " flu-like illness, " which can also be a confusing term.

流感诊断出人意料，您需要了解两种不同类型：A 型流感和 B 型流感。其他人被诊断出患有“流感样疾病”，这也是一个容易混淆的术语。