Tracing fields, methods and origins of Covid-19.

Coronavirus (Covid-19) appeared at the end of 2019 in the Chinese city of Wuhan, and it should be mentioned that there are research centers in both America and China that have worked on these viruses for many years ago before the appearance of this virus. At the beginning of the year 2020, this virus has spread widely in most countries worldwide and has led to great human and material losses, and the World Health Organization considered it a pandemic. A review analysis is conducted to be focused on many factors affecting the published papers on Covid-19 that applied to Science Direct library on 7/4/2020. We observed that most research studies have shown that this virus attacks the human respiratory system, which leads to shortness of breath and also leads to death in some cases. The obtained results showed that most of these research papers are focusing on statistics (41%), medicine (40%), management (17%), and healthcare (2%) respectively. Statistical analysis is helpful to understand the orientation of research papers published on Covid-19. Statistics and medicine respectively, occupy a large part of the research side of the Covid-19. It is a short time since the spread of the Corona virus, so research results cannot reach maturity. [ABSTRACT FROM AUTHOR]