Hints and tips:
...In the 1970s the German mathematician Klaus Dietz outlined a quantity known as the reproduction number R, representing the average number of people that an infectious individual will infect in a specific...
...Diane Dietz, chief executive of Rodan + Fields, a direct-sales skincare brand, was CMO of grocer Safeway, and Jeff Jones, who now heads H&R Block, the tax preparation company, held that role at retailer...
...No wonder that after a week of fearlessly pushing their physical, spiritual and narcotic limits, many Burners need a few days of R&R before returning to normal life....
International Edition