Influenza virus type, results for each qPCR replicate, and exhalation rate.

aNumber of influenza RNA copies detected per well (5 µl cDNA per well).bInfluenza virus RNA copies/ minuteND = not detected by qPCR; limit of quantification was 6 influenza virus RNA copies per qPCR well when all three replicates were detected.a. 每孔检测到的流感病毒RNA拷贝数（每个反应孔加入5 µl互补DNA（complementary DNA, cDNA））。 b. 流感病毒RNA拷贝数/分钟。注：ND指实时定量聚合酶链反应（quantitative real-time polymerase chain reaction, qPCR）未检出；当三次技术重复均被检出时，该qPCR反应的定量限为每孔6个流感病毒RNA拷贝。