SARS-CoV-2 variant: Its clinical importance and molecular epidemiology

Coronavirus disease 2019 (COVID-19) is a newly emerging disease. COVID-19 pandemic becomes a global problem in 2020. The disease causes more than 22 infected persons worldwide. Since this respiratory infection is a new coronavirus infection, the knowledge of its clinical epidemiology is very important for proper management. The diagnosis of the infection is usually based on molecular diagnosis. The molecular study of the pathogenic virus, SARS-CoV-2, might detect a mutated virus. The COVID-19 with mutated virus is an interesting emerging problem in medicine. There are some new reported on SARS-CoV-2 variants that are associated with altered clinical feature. In this short review article, the author summarizes and discusses the data on SARS-CoV-2 variant. The clinical importance and molecular epidemiology of SARS-CoV-2 variant are focused on the present article.