The Covid-19 (Novel corona virus) continues to wreck havoc across China, European countries, USA and now seems to gain a strong foothold in India. Currently, the research on COVID-19 is in its primary stages. Based on current published article, this review systematically summarizes the clinical characteristics of COVID-19. It is hoped that this review will help the public and medical person to recognize and deal with COVID-19, and provide a reference for future studies.