An outbreak of a new coronavirus in China has killed nine people and sickened more than 400, and has spread to several other countries. The first case outside of Asia was announced on Tuesday, as federal health officials confirmed that a Washington State man who had recently travelled to China had been hospitalized. Here’s a quick knowledge of what we know so far of this virus. What is a coronavirus?

Coronaviruses are named for the spikes that protrude from their membranes, which resemble the sun’s corona. They can infect both animals and people, and cause illnesses of the respiratory tract, ranging from the common cold to severe conditions like SARS, which sickened thousands of people around the world — and killed nearly 800 — during a 2003 outbreak infecting 10000 people. How do I know if I’m infected with the new coronavirus? Symptoms of infection include a high fever, difficulty…