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. 2021 Jan 6;39(7):1039–1043. doi: 10.1016/j.vaccine.2020.12.080

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© 2021 The Authors

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Fig. 1 — Number of cases per calendar month for mumps, IMD, acute HBV, and Hib among < 18, 18–64 and 65 + year-olds, and number of cases for IPD among < 18, 18–64, 65–79, and 80 + year-olds in the sentinel surveillance covering 25% of the Dutch population, and number of cases per month for pertussis among < 5, 5–11, 12–17, 18–64, and 65 + year-olds from January 2019 to September 2020 relative to the 5-year moving average. Nationwide control measures in view of the COVID-19 pandemic were taken on the 15th of March and are shaded dark in the figure (corresponding to oxCGRT stringency 70–80%). From mid-May, some measures were relaxed in the Netherlands and are shaded light in the Figure (corresponding to oxCGRT stringency 40–60%). Note: For IPD and pertussis, because of a higher number of cases, more age categories were applied than for the other diseases.