The coronavirus pandemic has sickened more than 577,400 people, according to official counts. As of Friday evening, at least 26,678 people have died, and the virus has been detected in at least 171 countries, as graphically illustrated on these maps by The New York Times.
There is evidence on six continents of sustained transmission of the virus. The Centers for Disease Control and Prevention has advised against all non-essential travel throughout most of Europe, and to South Korea, China and Iran. The agency has also warned that older and at-risk Americans should avoid travel to any country.
The outbreak is believed to have begun in a seafood and poultry market in Wuhan, a city of 11 million people in central China. The virus seems to spread very easily, especially in confined spaces, making containment efforts difficult. It is difficult to know how many people who contract the virus die, but some early estimates put the fatality rate at roughly 1 percent.
The number of known coronavirus cases in the United States continues to grow quickly and has now surpassed that of any other country in the world including mainland China where the virus supposedly originated. As of Thursday morning, there have been at least 100,973 cases of coronavirus confirmed by lab tests and 1,572 deaths in the U.S., according to a New York Times database. That same database details confirmed cases and deaths for all 171 countries.
While the outbreak is a serious public health concern, most people who contract the coronavirus do not become seriously ill, and only a small percentage require intensive care. Older people and those with existing health conditions, like heart or lung disease, are at higher risk.
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 province in central 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 severe pneumonia and multi-organ failure. As of 20 March 2020, the rate of deaths per number of diagnosed cases is 4.1 percent; however, it ranges from 0.2 percent to 15 percent, according to age group and other health problems.
The virus is typically spread from one person to another via respiratory droplets produced during coughing. It may also be spread from touching contaminated surfaces and then touching one’s face. Time from exposure to onset of symptoms is generally between two and fourteen days, with an average of five days.