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. 2020 Dec 9;9(2):693–701. doi: 10.1016/j.jaip.2020.11.054

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© 2020 American Academy of Allergy, Asthma & Immunology.

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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Forest plots of the prevalence of comorbid asthma in patients with COVID-19 with different severity. (A) Forest plot of the prevalence of comorbid asthma in hospitalized and nonhospitalized patients with COVID-19. (B) Forest plot of the prevalence of comorbid asthma in severe and nonsevere patients with COVID-19. (C) Forest plot of the prevalence of comorbid asthma in patients with COVID-19 requiring and not requiring ICU admission. (D) Forest plot of the prevalence of comorbid asthma in dead and survived patients with COVID-19. (E) Forest plot of the prevalence of comorbid asthma in patients with COVID-19 requiring and not requiring intubation/mechanical ventilation.