As the world moves toward another morbid threshold in the pandemic, a coronavirus death toll of one million, the countries where fatalities are increasing fastest remain spread out across the globe, with new hot spots constantly emerging.

The number of lives lost daily to the virus has been rising through most of August and September, reaching more than 5,000 in an average measured over seven days. As of Sunday morning, the global total stood at 993,600, according to a New York Times database.

Why the coronavirus affects children much less severely than adults has become an enduring mystery of the pandemic. The vast majority of children do not get sick; when they do, they usually recover.