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。
英语百科
Nucleic acid test
A nucleic acid test, often called a "NAT", (or nucleic acid amplification test / "NAAT") is a molecular technique used to detect a virus or a bacterium. These tests were developed to shorten the window period, a time between when a patient has been infected and when they show up as positive by antibody tests.