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. 2022 May 21;129(2):182–188.e1. doi: 10.1016/j.anai.2022.05.014

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© 2022 American College of Allergy, Asthma & Immunology. Published by Elsevier Inc.

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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Flowchart of patients recruited and exclusion criteria. Most of the patients reported an allergic reaction to more than 1 agent. AZ, AstraZeneca; COVID-19, coronavirus disease 2019; GD, graded dosing; MUHC, McGill University Health Centre; PEG, polyethylene glycol; PS, polysorbate; SPT, skin prick test.