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. 2023 May 10;41(26):3923–3929. doi: 10.1016/j.vaccine.2023.05.022

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© 2023 The Author(s)

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. 3 — Vaccine effectiveness among health care workers (HCW) and non-HCW against infections during the Delta (31 July-12 November 2021) and Omicron (3–30 January 2022) wave in Norway after excluding individuals with underlying conditions. The data behind the figure are available in the Supplementary section 4.3. The number of cases who received three doses during the delta wave were less than 5 and estimates are not provided.