We analyzed the movements of hundreds of millions of people to show why the most extensive travel restrictions to stop an outbreak in human history haven’t been enough.

Nurses and doctors rank high. But so do hairdressers and dentists.

New estimates from a Harvard research team show that, in many parts of the country, there may not be enough hospital beds and staff for coronavirus patients. A shortage of intensive care beds for the...

It has tested at a much lower rate than Italy, which has outpaced the rest of Europe, and South Korea, where testing and monitoring have slowed the growth of new cases.

These charts show the trajectory of the coronavirus pandemic in each country. New cases have dwindled in China and South Korea, but the virus continues to spread rapidly in most of the world.

Immediate steps to limit social contact in parts of the United States where few cases have been identified are needed to slow the outbreak, a model suggests.

Compare the number of deaths and the rate of increase over time in the places the virus has hit hardest so far.

It’s been two months since the first confirmed case was reported in the United States. As testing expanded and the virus spread, the number of new cases has multiplied at a rapid pace.

New data released by the city shows that lower-income neighborhoods have been most affected by the virus.

People in Florida and elsewhere continued to travel widely last week, potentially exposing more people to the coronavirus, phone data shows.