Over the past four weeks, the USA saw more new Covid-19 cases per 1M pop. than any other large country. (Countries shown in this chart are those with 37 million or more residents and more than 10 new cases per 1M pop. during the week ending 5/3.) The country that looks in most danger at the moment is Brazil -- last week, it saw more new cases per 1M pop. than any other country on this chart.