Coronavirus disease 2019 (COVID-19) is an infectious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The disease was first identified in 2019 in Wuhan, the capital of Hubei, China, and has since spread globally, resulting in the 2019–20 coronavirus pandemic. Common symptoms include fever, cough, and shortness of breath. Muscle pain, sputum production, diarrhea, and sore throat are less common. While the majority of cases result in mild symptoms, some progress to pneumonia and multi-organ failure. As of 25 March 2020, the rate of deaths per number of diagnosed cases is 4.5 percent; however, it ranges from 0.2 percent to 15 percent, according to age group and other health problems. The fatality rate varies widely from place to place and over time due to variation in how broadly a population is tested, and due to variations in availability of sufficient healthcare facilities and personnel.