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Positive COVID-19 patients were subjected to clinical examination, computed tomography of the chest, and laboratory investigations. Serum vitamin D level was measured and correlated with the severity and the clinical course of the disease. The study included 72 patients, classified into four groups according to the severity of the disease. There was a statistically significant difference between the four groups regarding age, lymphocyte count, serum vitamin D, C-reactive protein, and lactate dehydrogenase levels. Serum vitamin D levels can be correlated with COVID-19 severity and clinical course.<\/jats:p>","DOI":"10.4081\/monaldi.2024.2978","type":"journal-article","created":{"date-parts":[[2024,9,26]],"date-time":"2024-09-26T08:26:50Z","timestamp":1727339210000},"source":"Crossref","is-referenced-by-count":0,"title":["Serum vitamin D levels and the severity and clinical course of COVID-19"],"prefix":"10.4081","volume":"95","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8921-7622","authenticated-orcid":false,"given":"Mohamed","family":"Elnady","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ahmed Abdel","family":"Hafeez","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hebatallah","family":"Assal","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eman","family":"Zaid","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7152-9786","authenticated-orcid":false,"given":"Gihan","family":"Abo Elwafa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"2549","published-online":{"date-parts":[[2024,9,26]]},"reference":[{"key":"44828","doi-asserted-by":"publisher","DOI":"10.7861\/clinmed.2020-0301"},{"key":"44829","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0222313"},{"key":"44830","doi-asserted-by":"publisher","DOI":"10.4178\/epih.e2021074"},{"key":"44831","doi-asserted-by":"publisher","DOI":"10.1007\/s11154-011-9195-z"},{"key":"44832","unstructured":"World Health Organization. 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Are vitamin D receptor activators useful for the treatment of thrombosis? 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