Susie Buffett sat next to someone who had just returned from a trip to Spain and subsequently rested positive for COVID-19, the Omaha World-Herald reported.
Trump urged Americans to ease up with their shopping as people panic about not having enough food or household items while they are increasingly being asked to stay at home for extended periods of times.
Biden and Sanders, in a one-on-one Democratic primary debate, cast themselves as better equipped to handle the coronavirus pandemic than President Trump.
The Federal Reserve announced it will begin buying $200 billion of mortgage-backed bonds, a move that will stabilize and likely lower mortgage rates, which moved sharply higher last week.
The central bank chair said he is focusing on interest rates and other "liquidity tools" to keep credit flowing and financial markets operating properly.
The Democrat-led house last week passed the second round of legislation, aimed at helping workers and individuals struggling to make it through the crisis.
Delta and its pilots' union have reached an agreement on voluntary, reduced pay and other issues as the coronavirus prompts the airline to make deep cuts.
Zenefits, which sells software for managing payroll, is listed as the top vendor to Biden's presidential campaign. His revival has been a boon for the San Francisco start-up.
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