The how, why, where and what of the coronavirus
Do masks really help? Is a vaccine being made? Is it a global emergency?
Scientists around the world are racing to understand the deadly coronavirus that emerged in China last month. Several thousand people have already been infected, with the number of cases rising rapidly because of the huge number of Chinese on the move for the lunar new year holiday. International travellers have helped spread it further afield, including to the US and Europe. There are fears that, if the respiratory illness that probably started in a food market in the central city of Wuhan continues to spread, it will develop into a serious epidemic.
How dangerous is the new coronavirus?