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Coronavirus, a pandemic threat to human beings, has awakened huge concern worldwide, but no bibliometric studies have been conducted on Coronavirus research during 2011-Feb.2020. The aim of this study is to map research productivity on the Coronavirus based on the articles indexed in the Scopus database. The articles related to Coronavirus dated from 2011 to Feb. 2020 were retrieved from the Scopus database. A total of 7558 papers were retrieved for this study which indexed by the Scopus database during 2010-Feb. 2020. The most productive year is recognized 2015with 1012 (13.38 %) articles while Maximum AGR 40.38 percent was recorded in the year. The USA ranked first with 2373 publications, followed by China with1378 publications while The Journal of Virology published the highest 330 articles followed by PLoS One with 224 articles. Dusten, C. is ranked topmost productive corresponding author (first position) with 108 articles followed by Memish, Z.A. with 107 articles. Medicine subject identified as the top subject for publishing paper on Coronavirus followed by Immunology and Microbiology. The title Isolation of a novel coronavirus from a man with pneumonia in Saudi Arabia received the highest 1346 citations, followed by Immune Signaling by RIG-I-like Receptors with 818 citations. [ABSTRACT FROM AUTHOR]

• Vitamin D serum levels above 35 ng/mL seem to correlate with the mortality rate of COVID-19 patients. • The majority of the Western population is deficient in Vitamin D. • Vitamin D3 supplementation also requires additional vitamin K2 intake. • The immunoregulating function of vitamin D is promising and might decrease the global epidemic mortality. The world is desperately seeking for a sustainable solution to combat the coronavirus strain SARS-CoV-2 (COVID-19). Recent research indicated that optimizing Vitamin D blood levels could offer a solution approach that promises a heavily reduced fatality rate as well as solving the public health problem of counteracting the general vitamin D deficiency. This paper dived into the immunoregulatory effects of supplementing Vitamin D 3 by elaborating a causal loop diagram. Together with D 3 , vitamin K 2 and magnesium should be supplemented to prevent long-term health risks. Follow up clinical randomized trials are required to verify the current circumstantial evidence. [ABSTRACT FROM AUTHOR]

Coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome (SARS) coronavirus 2 (SARS-CoV-2), shares similarities with the former SARS outbreak, which was caused by SARS-CoV-1. SARS was characterized by severe lung injury due to virus-induced cytopathic effects and dysregulated hyperinflammatory state. COVID-19 has a higher mortality rate in men both inside and outside China. In this opinion paper, we describe how sex-specific immunobiological factors and differences in angiotensin converting enzyme 2 (ACE2) expression may explain the increased severity and mortality of COVID-19 in males. We highlight that immunomodulatory treatment must be tailored to the underlying immunobiology at different stages of disease. Moreover, by investigating sex-based immunobiological differences, we may enhance our understanding of COVID-19 pathophysiology and facilitate improved immunomodulatory strategies. [ABSTRACT FROM AUTHOR]