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. 2019 Jul 16;79(4):373–382. doi: 10.1016/j.jinf.2019.07.008

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© 2019 The British Infection Association. Published by Elsevier Ltd. All rights reserved.

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Fig. 1 — The incidence of the four respiratory viruses in the eighteen surveillance sites. Panels (A)–(D) show the monthly incidence of (A) influenza A virus, (B) influenza B virus, (C) respiratory syncytial virus, and (D) parainfluenza viruses from January 2010 to December 2015. The left-hand column displays the order of the geographical origin of the data for each of the four heat maps in the central column. The final right-hand column indicates the individual viruses for which the monthly incidence is displayed at each of these geographical sites. The maximum value of the colour scale is set to the highest incidence value (against which the other data for that site is normalised) at each surveillance site after excluding any outliers. The grey boxes indicate that no data was available from that site during that period. Some sites were only able to provide data for only some of these viruses for a limited period (usually within the period of a specifically funded study).