COVID-19 is caused by the novel coronavirus SARS-CoV-2 and has become a global pandemic since it was first reported in Wuhan, China in December 2019. Research on COVID-19 includes studies on the virus's transmission, symptoms, treatment options, vaccines, and public health interventions to control its spread. This research area has been a major focus for scientists, healthcare professionals, and policymakers around the world in order to better understand and ultimately control the spread of the virus.