Table 1 The equations for calculating the indexes
From: Global dynamic spatiotemporal pattern of seasonal influenza since 2009 influenza pandemic
Index | Definition of the index | Equation to calculate the index |
|---|---|---|
PA | the proportion of influenza A virus in total influenza positive virus | (total number of influenza A virus) / (total number of influenza positive virus) |
RWA | weekly positive rate of influenza A | (weekly number of influenza A positive virus) / (total number of samples processed) |
RWB | weekly positive rate of influenza B | (weekly number of influenza B positive virus) / (total number of samples processed) |
RA | the average positive rate of influenza A | (RWAweek1 + RWAweek2+… + RWAweek52) / 52 |
RB | the average positive rate of influenza B | (RWBweek1 + RWBweek2+...+RWBweek52) / 52 |