More countries shut their borders as death toll mounts

As labs pledge to make more test kits, here’s why testing may still lag

From coast to coast, local and state officials complain that shortages of everyday supplies are disrupting efforts to sharply ramp up testing, which is key to identifying the spread of disease. By Carolyn Y. Johnson, Brady Dennis, Steven Mufson and Tom Hamburger

Younger adults are large percentage of virus hospitalizations in U.S., CDC finds

Stark new data from the United States and Europe suggests people younger than 50 have a higher risk from coronavirus complications than many realize.

By Ariana Eunjung Cha

Guide to the pandemic

The virus has infected more than 222,000 people and has killed more than 9,000. Access to the following stories is free:

Join us at 3 p.m. ET for a live Q&A about symptoms, the government’s response and more. Submit questions here.

This simulation shows how to ‘flatten the curve’Mapping the virus’s spread

Q&A: What if I think I’m infected?

A letter from Post executive editor Martin Baron