The death toll from coronavirus has already crossed 1,100. The UN health agency on Wednesday officially named the deadly virus "COVID-19".
But how does one know that they got infected with this COVID-19?
The American Medical Association (JAMA) published a journal on February 7, where they showed the common symptoms of coronavirus patients after conducting a study on 138 patients.
The common symptoms among these 138 patients were fever, fatigue and dry cough. A third of the patients also reported muscle pain and difficulty breathing, while about 10 percent had atypical symptoms, including diarrhoea and nausea.
According to JAMA, on average, people became short of breath within five days of the onset of their symptoms. Severe breathing trouble was observed in about eight days.
While the study did not give a timeline for when the deaths occurred, another study published in the Journal of Medical Virology on January 29 said on average, people who died did so within 14 days of the onset of the disease.
The New England Journal of Medicine, in a study published on January 31, also offered a look at how the coronavirus infection affects the body over time.
The study examined medical data of a 35-year-old man, who was the first case of infection in the United States. The first symptom was a dry cough, followed by a fever.
On the third day of illness, he reported nausea and vomiting followed by diarrhoea and abdominal discomfort on the sixth day. By the ninth day, he had developed pneumonia and reported difficulty breathing.
By the twelfth day, his condition had improved and his fever was subsiding. He developed a runny nose.
However. And on day 14, he was asymptomatic except for a mild cough. He was still hospitalised at the time the study was published.