The current public health emergency is in part similar to the emergence of SARS in southern China in 2002. Both occurred in the winter with initial cases linked to exposure to live animals sold in animal markets, and both were caused by previously unknown coronaviruses.

RT-PCR is currently the leading tool for diagnosing COVID-19. Many studies around the world have also shown that CT scans are indispensable in supporting the diagnosis, care, and monitoring of Covid-19 patients.