covid-19

Coronavirus disease 2019 (COVID-19) is an infectious disease caused by SARS-CoV-2, a virus closely related to the SARS virus. The disease is the cause of the 2019–20 coronavirus outbreak. It passes from one person to others via respiratory droplets produced from the airways, often during coughing or sneezing. Time from exposure to onset of symptoms is generally between 2 and 14 days, with an average of 5 days. Hand washing, maintaining distance from people who are coughing, and not touching one's face with unwashed hands are measures recommended to prevent the disease. It is recommended to cover one's nose and mouth with a tissue or a bent elbow when coughing.People may have few symptoms or develop fever, cough, and shortness of breath. Cases can progress to pneumonia and multi-organ failure. There is no vaccine or specific antiviral treatment, with management involving treatment of symptoms, supportive care, and experimental measures. The case fatality rate is estimated at between 1% and 3%.The World Health Organization (WHO) and U.S. Centers for Disease Control and Prevention (CDC) recommend those who suspect that they are carrying the virus wear a surgical face mask and seek medical advice by calling a doctor rather than directly visiting a clinic in person. Masks are also recommended for those who are taking care of someone with a suspected infection. Masks are not recommended for the general public. The WHO has declared the 2019–20 coronavirus outbreak to be a Public Health Emergency of International Concern (PHEIC). As of 29 February, China, Hong Kong, Iran, Italy, Japan, Singapore, South Korea, and the United States are areas having evidence of community transmission of the disease.

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