Abstract
SARS CoV-2, a causative agent of human respiratory tract infection, was first identified in late 2019. It is a newly emerging viral disease with unsatisfactory treatments. The virus is highly contagious and has caused pandemic globally. The number of deaths is increasing exponentially, which is an alarming situation for mankind. The detailed mechanism of the pathogenesis and host immune responses to this virus are not fully known. Here we discuss an overview of SARS CoV-2 pathogenicity, its entry and replication mechanism, and host immune response against this deadly pathogen. Understanding these processes will help to lead the development and identification of drug targets and effective therapies.
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