U.S. President-elect Joe Biden on Thursday tested negative for the novel coronavirus after a close aide contracted the virus, a spokeswoman said.Incoming White House Senior Adviser Cedric Richmond, who developed symptoms on Wednesday, was not in close contact with Biden having spent less than 15 consecutive minutes with him while masked in an open-air setting, the spokeswoman Kate Bedingfield said in a statement.U.S. authorities define close contact as 15 minutes or more within six feet of an infected person.Democrat Biden, who defeated Republican President Donald Trump in the Nov. 3 electi…READ FULL ARTICLE