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. 2022 Jul 8;122:636–643. doi: 10.1016/j.ijid.2022.07.005

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© 2022 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. 3 — Adjusted risk difference^a of symptoms during illness or previous week, comparing SARS-CoV-2 infected adults (≥16 years) and adult controls (≥16 years).

⁽^aRisk difference with 95% confidence intervals was adjusted for age, sex, BMI, smoking, co-morbidity, vaccination (yes/no), and previous COVID-19 infection)

BMI = body mass index.