The coronavirus outbreak came in the middle of flu season in the Northern Hemisphere. Many people have highlighted the overlapping symptoms of the flu and COVID-19, the disease caused by the coronavirus. Even President Donald Trump asked pharmaceutical execs if the flu vaccine could be used to stop the coronavirus. But Tedros Adhanom Ghebreyesus, the director-general of the World Health Organization, warned against taking such comparisons too far. "This virus is not SARS, it's not MERS, and it's not influenza," Ghebreyesus said in a press conference on Tuesday. "It is a unique virus with unique characteristics." The most crucial difference...