Investigators looking into the COVID-19 mystery could be one step closer to unmasking "patient zero." A seafood merchant in Wuhan, China, is believed to be the first person diagnosed as having the coronavirus, which can be linked back to a wet market in China, leaked documents allege. The Daily Mail reported Thursday that China's The Paper claims Wei Guixian, a 57-year-old woman working in Wuhan is the first person on record to be infected with the coronavirus. Wei told the media outlet she started feeling sick on December 10. Thinking she might have the flu, she went to a local...