Incidence data

Incidence data for seasonal influenza viruses A/H3N2, A/H1N1, B/Vic and B/Yam. Each row represents a USA winter influenza season. The column "flu" gives the frequency of influenza positive isolates from all isolates tested. The columns "typeA" and "typeB" give the relative frequencies of influenza A and influenza B in samples that tested positive. The columns "subtypeH3", "subtypeH1", "subtypeH1pdm" give the relative frequencies of A/H3N2, A/H1N1 and pandemic A/H1N1 among type A samples. The columns "subtypeVic" and "subtypeYam" give the relative frequencies of B/Vic and B/Yam among type B samples. The column "ili" gives the influenza-like illness (ILI) frequency over the same season.本数据集包含季节性流感病毒A/H3N2、A/H1N1、B/Vic及B/Yam的感染数据。每一行代表一个美国冬季流感季。其中，"flu"列表示所有送检分离株中流感阳性分离株的占比；"typeA"与"typeB"列分别表示流感阳性样本中甲型流感（influenza A）与乙型流感（influenza B）的相对占比；"subtypeH3"、"subtypeH1"、"subtypeH1pdm"列分别表示甲型流感样本中A/H3N2、A/H1N1以及大流行甲型H1N1（pandemic A/H1N1）的相对占比；"subtypeVic"与"subtypeYam"列分别表示乙型流感样本中B/Vic与B/Yam的相对占比；"ili"列表示对应流感季的流感样病例（influenza-like illness, ILI）发生率。