There’s a deadly virus spreading. The virus is influenza, and it poses a far greater threat than the coronavirus from China that has made headlines around the world. To be sure, the coronavirus outbreak, which originated last month in the Chinese city of Wuhan, should be taken seriously. The virus can cause pneumonia and is blamed for more than 800 illnesses and 26 deaths. British researchers estimate the virus has infected 4.000 people. Influenza rarely gets this sort of attention. Worldwide, the flu causes up to 5 million cases of severe illness and kills up to 650.000 people every year, according to the World Health Organization.