Experimental COVID-19 vaccine is put to its biggest test

The biggest test yet of an experimental COVID-19 vaccine got underway Monday with the first of some 30,000 Americans rolling up their sleeves to receive shots created by the U.S. government as part of the all-out global race to stop the pandemic.The glimmer of hope came even as Google, in one of the gloomiest assessments of the coronavirus’s staying power from a major employer, decreed that most of its 200,000 employees and contractors should work from home through next June — a deci