CORONA IS A PENDEMIC
How is the coronavirus spreading around the world? Corona is a pendemic.
The coronavirus emerged in Wuhan, a city of 11 million people in China’s Hubei province, in late 2019. Cases of the disease it causes, COVID-19, grew by several thousand per day in China in late January and early February, the peak of the epidemic there Corona is a pendemic.
The number of infections appearing each day has since plummeted in China, owing in large part to containment efforts, but the outbreak is now a global pandemic. Large outbreaks in South Korea, Iran, Italy and elsewhere have propelled a spike in international cases across more than 150 countries .
How does COVID-19 compare to other diseases?
Current estimates of COVID-19’s case fatality rate — a measure of the proportion of infected people who eventually die — suggest that the coronavirus is less deadly than the pathogens behind other large-scale outbreaks, such as of SARS (severe acute respiratory syndrome), MERS (Middle East respiratory syndrome) and Ebola.
But the infection also seems to spread more easily than other diseases, including seasonal influenza. Calculations of the virus’s basic reproduction number, or R0 — the number of people on average one infected person will pass the virus to — suggest a range of 2–2.5.
How fast are researchers publishing new coronavirus research?
The outbreak has prompted an explosion of research on the coronavirus and the disease that it causes. To get an estimate of the scale of research activity, Nature searched for studies using the terms ‘novel coronavirus’, ‘ncov’, ‘COVID-19’ and ‘SARS-CoV-2’ on the bioRxiv, medRxiv, ChemRxiv and ChinaXiv servers, as well as compiling publications listed by the WHO, and on Google Scholar. As of 12 March there had been around 900 papers, preprints and preliminary reports related to coronavirus.