Coverage on this live blog has ended, click here for NBC News' latest reporting on Covid-19.
Arizona, California and Rhode Island are among the hardest-hit places in the world at this stage of the pandemic, with the highest rates of Covid-19 infections per capita, according to a data analysis by NBC News.
The sobering figures highlight just how dire the situation is in the United States, particularly after a new, more contagious variant of the coronavirus emerged in several states.
- Map of U.S. hot spots and worldwide Covid-19 cases.
- Tracking surges in states across the country this winter.
- Map of travel restrictions and which states have a mask mandate.
- Click here for more of NBC News' Covid-19 coverage.