Coronavirus is a kind of viral virus that causes the nose, sinus or upper throat to become infected. Many coronaviruses are not considered dangerous.
In early 2020 a new type was reported by the World Health Organization (WHO): 2019 novel coronavirus (2019-nCoV) in Wuhan, China. There were over 900 confirmed cases in China by late January and a death count still small but increasing. Despite screenings at airports, both the United States and Europe have declared their first cases.
Most coronaviruses show symptoms similar to any other upper respiratory infection. In most cases, you won’t know if you’ve got a coronavirus, or another cold-causing virus, like rhinovirus.