Articles published from 1 January 2020 to 26 May 2021 in Pubmed, EMBASE, Web of Science and MedRxiv Database were searched. To identify all the articles regarding the prevalence of ILD in COVID-19 and relationship between ILD and COVID-19, we used the following terms alone or in combination for literature search: “SARS-CoV-2”, “COVID-19”, “2019-nCoV”, “nCoV”, “coronavirus”, “severe acute respiratory syndrome coronavirus 2”, “interstitial lung disease”, “ILD” and “interstitial pneumonia”.
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