Over 1.5 billion globally told to stay home to avoid virus

People applaud from their window in support of the medical staff working on the COVID-19 virus outbreak in Barcelona, Spain, Monday, March 23, 2020. For most people, the new coronavirus causes only mild or moderate symptoms. For some it can cause more severe illness. (AP Photo/Felipe Dana)

Biologist doctor Caroline Gutsmuth gives a phone call in medical biology laboratory who opened a coronavirus drive-thru testing site, in Neuilly-sur-Seine, near Paris, Monday, March 23, 2020. French President Emmanuel Macron urged employees to keep working in supermarkets, production sites and other businesses that need to keep running amid stringent restrictions of movement due to the rapid spreading of the new coronavirus in the country. For most people, the new coronavirus causes only mild or moderate symptoms. For some it can cause more severe illness, especially in older adults and people with existing health problems. (AP Photo/Christophe Ena)

A commuter crosses 42nd Street in front of Grand Central Terminal during morning rush hour, Monday, March 23, 2020, in New York. Gov. Andrew Cuomo has ordered most New Yorkers to stay home from work to slow the coronavirus pandemic. (AP Photo/Mark Lennihan)

Commuters pass through Grand Central Terminal during the morning rush hour, Monday, March 23, 2020, in New York. Gov. Andrew Cuomo has ordered most New Yorkers to stay home from work to slow the coronavirus pandemic. (AP Photo/Mark Lennihan)

NEW YORK — With masks, ventilators and political goodwill in desperately short supply, more than one-fifth of the world’s population was ordered or urged to stay in their homes Monday at the start of what could be a pivotal week in the battle to contain the coronavirus in the U.S. and Europe.