What is Coronavirus and 15 Symptoms

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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 December 2019 in Wuhan, the capital of China's Hubei province, and has since spread globally, resulting in the ongoing 2019–20 coronavirus pandemic.

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Common symptoms include fever, cough, and shortness of breath. Other symptoms may include fatigue, muscle pain, diarrhea, sore throat, loss of smell, and abdominal pain. The time from exposure to onset of symptoms is typically around five days but may range from two to fourteen days. While the majority of cases result in mild symptoms, some progress to viral pneumonia and multi-organ failure. As of 14 April 2020, more than 1.94 million cases have been reported across 210 countries and territories, resulting in over 123,000 deaths. More than 467,000 people have recovered.

The World Health Organization (WHO) declared the 2019–20 coronavirus outbreak a Public Health Emergency of International Concern (PHEIC) on 30 January 2020 and a pandemic on 11 March 2020. Local transmission of the disease has been recorded in many countries across all six WHO regions.

Signs and symptoms

Those infected with the virus may be asymptomatic or develop flu-like symptoms such as fever, cough, fatigue, and shortness of breath. Emergency symptoms include difficulty breathing, persistent chest pain or pressure, confusion, difficulty walking, and bluish face or lips; immediate medical attention is advised if these symptoms are present.

Less commonly, upper respiratory symptoms—such as sneezing, runny nose, or sore throat—may be seen. Gastrointestinal symptoms such as nausea, vomiting, and diarrhea have been observed in varying percentages. Some cases in China initially presented only with chest tightness and palpitations. 

In March 2020 there were reports indicating that loss of the sense of smell (anosmia) may be a common symptom among those who have mild disease, although not as common as initially reported. In some, the disease may progress to pneumonia, multi-organ failure, and death. In those who develop severe symptoms, time from symptom onset to needing mechanical ventilation is typically eight days.

As is common with infections, there is a delay between the moment when a person is infected with the virus and the time when they develop symptoms. This is called the incubation period. The incubation period for COVID-19 is typically five to six days but may range from two to 14 days. 97.5% of people who develop symptoms will do so within 11.5 days of infection.

Reports indicate that not all who are infected develop symptoms, but their role in transmission is unknown. Preliminary evidence suggests asymptomatic cases may contribute to the spread of the disease. The proportion of infected people who do not display symptoms is currently unknown and being studied, with the Korea Centers for Disease Control and Prevention (KCDC) reporting that 20% of all confirmed cases remained asymptomatic during their hospital stay. China's National Health Commission began including asymptomatic cases in its daily cases on 1 April; of the 166 infections on that day, 130 (78%) were asymptomatic.

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Symptom	Fever	Dry cough	Fatigue	Sputum    production	Loss of smell	Shortness of breath	Muscle or joint pain	Sore throat
%	88	68	38	33	15 to 30	19	15	14

      

 

Symptom	Headache	Chills	Nausea or vomiting	Nasal congestion	Diarrhea	Haemoptysis	Pink eyes
%	14	11	5	5	4 to 31	0.9	0.8

References and sites relatives:

https://en.wikipedia.org/wiki/Coronavirus_disease_2019

https://www.hopkinsmedicine.org/health/conditions-and-diseases/coronavirus

https://www.who.int/health-topics/coronavirus#tab=tab_1