Coronaviruses are a large group of viruses that are common among animals. The viruses can make people sick, usually with a mild to moderate upper respiratory tract illness, similar to a common cold. Coronavirus symptoms include a runny nose, cough, sore throat, possibly a headache and maybe a fever, which can last for a couple of days.
December 31, 2019 – Cases of pneumonia detected in Wuhan, China, are first reported to the WHO. During this reported period, the virus is unknown. The cases occur between December 12 and December 29, according to Wuhan Municipal Health.
January 1, 2020 – Chinese health authorities close the Huanan Seafood Wholesale Market after it is discovered that wild animals sold there may be the source of the virus.
January 5, 2020 – China announces that the unknown pneumonia cases in Wuhan are not SARS or MERS. In a statement, the Wuhan Municipal Health Commission says a retrospective probe into the outbreak has been initiated.
January 7, 2020 – Chinese authorities confirm that they have identified the virus as a novel coronavirus, initially named 2019-nCoV by the WHO.