Introduction: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-associated coronavirus pandemic has posed a global health emergency.
Methods: This chapter focuses on the epidemiology and transmission immunopathology of SARS-CoV-2 infection based on the available data on SARS-CoV-2 and other coronaviruses.
Results: The virus is transmitted by inhalation or contact with infected droplets, and the incubation period ranges from 2 to 14 days. The case fatality rate is estimated at 6%. Following binding with cell surface angiotensin-converting enzyme 2 (ACE2) receptor, the SARS-CoV-2 enters the host cell and replicates by using host machinery to cause disease.
Conclusions: Cytokine storm due to COVID-19 has challenged the treatment outcome.
Keywords: ACE2; COVID-19; Cytokines; Epidemiology; SARS-CoV-2; Spike protein transmission.
© 2021. The Author(s), under exclusive license to Springer Nature Switzerland AG.