Coronavirus disease 2019 abbreviated as COVID-19 has emerged out to be the greatest public health problem in the world. Coronavirus disease 2019 is caused by a novel virus belonging to the coronavirus family, which causes respiratory disease. Coronavirus disease 2019 is a highly contagious disease with person-to-person transmission, and now affecting the whole world through community transmission. The disease has spread throughout the world with varied mortality rates in different countries. The disease has higher mortality rates among people with extremes of age and the presence of comorbidities. The present review attempts to provide a snapshot of the various immunological responses against this disease sometimes with disastrous consequences such as the cytokine storm.
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