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. 2019 Mar 27;37(18):2470–2476. doi: 10.1016/j.vaccine.2019.03.046

Fig. 1.

Fig. 1

Distribution of Severe Acute Respiratory Infections (SARI) cases and the positive cases for Influenza and other respiratory viruses detected from the epidemiological weeks 40/2012 to 20/2016. The period of winter in the North Hemisphere is highlighted in blue. Detections were performed by either immunofluorescence assay or real time RT-PCR. The period of influenza vaccine campaign begins in October (epidemiological week 42) in Catalonia (Spain). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)