COVID-19: The Pandemic Unfolds
SM Kadri, AH Brady and Nighat Nazir
Published: March 07, 2022
Abstract  
COVID-19 emerged from Wuhan, China in late 2019. A new strain of coronavirus, it was not previously identified in humans. Coronaviruses are a large family of viruses which cause illness ranging from a mild cold to severe disease, for instance Severe Acute Respiratory Syndrome (SARS-CoV).