We compared 2019 influenza seasonality and vaccine effectiveness (VE) in four southern hemisphere countries: Australia, Chile, New Zealand and South Africa. Influenza seasons differed in timing, duration, intensity and predominant circulating viruses. VE estimates were also heterogeneous, with all-ages point estimates ranging from 7–70% (I 2 : 33%) for A(H1N1)pdm09, 4–57% (I 2 : 49%) for A(H3N2) and 29–66% (I 2 : 0%) for B. Caution should be applied when attempting to use southern hemisphere data to predict the northern hemisphere influenza season.
All Keywords
【저자키워드】 Influenza, sentinel surveillance, vaccine effectiveness, influenza vaccines, southern hemisphere,
【저자키워드】 Influenza, sentinel surveillance, vaccine effectiveness, influenza vaccines, southern hemisphere,