Coronavirus Disease 2019 (COVID-19): Immune Responses, Transmission and Clinical features: An Update

A novel beta-coronavirus was reported in Wuhan, Hubei Province, China, which in December 2019, named SARS-CoV-2.  It causes Coronavirus Disease 2019 (COVID-19) that can affect lung tissue and airways. The immune system can respond to SARS-CoV-2 infection via various mechanisms. Cytokines play crucial roles in COVID-19. In the present study, the latest information on the immune responses, transmission, symptoms, diagnosis, and treatment of COVID-19 is reviewed.