Clinicians, scientific communities, biotech companies, public health agencies alongside with governments around the world are working to support the fight against the current COVID19 pandemic. Despite these huge efforts, we do not have a detailed picture of the new coronavirus, including the immunopathogenesis of the disease.
This review tries to explain some of the basic mechanism of host immune response in combating the infection, which can also serve as explanation to the wide variety of clinical responses from asymptomatic, mild to severe cases.

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