Coloured 3D computed tomography (CT) scan (axial view) of a solitary are of a human lung affected by Covid-19 atypical pneumonia (upper left). Covid-19 is a respiratory infection that can lead to fatal pneumonia. It is caused by the coronavirus SARS-CoV-2 (previously 2019-nCoV), which was first identified in Wuhan, China, in December 2019. As of April 20th 2020, over 2.2 million have been infected worldwide with over 152,500 deaths. Social restrictions and infection control measures have been put in place to slow the spread of the virus.