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. 2018 Aug 17;8:12334. doi: 10.1038/s41598-018-30048-x

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Invasive meningococcal disease incidence in Shanghai, China during 1950–2016, as reported in National Notifiable Diseases Registry System. The times of introduction of serogroup A (1980) and serogroups A and C polysaccharide vaccines (2008) in Shanghai, China were indicated with red arrow. Inset figure shows the incidence after 1970. The highest incidences in different epidemic period were labelled. MenA, serogroup A meningococcus; MPV, meningococcal polysaccharide vaccine.