U.S. President Donald Trump has invoked emergency powers to battle the coronavirus as deaths accelerate in Europe. World leaders are warning of nearly wartime measures to come to contain the spreading pandemic. Schools have closed across three continents and security forces are on standby to guard against large gatherings of people. France's president has announced leaders of the G-7 democracies will hold a video-conference summit to coordinate vaccine research and an economic response. On Wall Street, stocks have recouped some losses after the worst day in three decades.

The AP plans the following coverage. For up-to-the minute information, visit AP Newsroom's coverage hub at https://newsroom.ap.org/page/Coronavirus

VIRUS OUTBREAK: World leaders are warning of nearly wartime measures to come to contain the spreading pandemic. SENT; developing.

VIRUS OUTBREAK-THE LATEST: Latest developments on the global virus outbreak. SENT; developing.

VIRUS OUTBREAK-WHAT'S HAPPENING: Chunky text look at biggest developments in virus outbreak. SENT; developing.

VIRUS OUTBREAK-WASHINGTON: President Donald Trump on Friday declared the coronavirus pandemic a national emergency, as Washington struggles with providing Americans with relief and officials race to slow the spread of the outbreak. SENT; developing.

VIRUS OUTBREAK-TRUMP: The coronavirus pandemic is inching ever closer to President Donald Trump, as questions swirled about why the president, his top aides and his family weren't going into self-quarantine, doing more to protect themselves or being tested for COVID-19. SENT; developing.

VIRUS OUTBREAK-US PRIMARIES: Elections officials in the four states holding presidential primaries next week say they have no plans to postpone voting amid widespread disruptions caused by the coronavirus outbreak. Instead, they are taking extraordinary steps to ensure that voters can cast ballots and polling places are clean. SENT; developing. WITH VIRUS OUTBREAK-LOUISIANA: Louisiana's governor says he intends to postpone the state's presidential primaries due to fears of the coronavirus.

ELECTION 2020-VIRTUAL CAMPAIGN: The 2020 presidential race has entered a new virtual phase because of the coronavirus and warnings from health officials against large gatherings. SENT.

FINANCIAL MARKETS: Stocks surged, recouping much of a historic plunge, after President Donald Trump announced new measures to fight the coronavirus. SENT; developing. With FINANCIAL MARKETS-THE LATEST

VIRUS OUTBREAK-BUSINESS FALLOUT: Apple said its annual developers conference would take place entirely online this year, joining a growing list of companies that are canceling big, in-person events as the coronavirus spreads. SENT; developing.

VIRUS OUTBREAK-VULNERABLE WORKERS: White collar workers trying to avoid contagion can work from home or call in sick if they experience symptoms of the fast-spreading coronavirus. But such precautions are not an options for the millions of waiters, delivery workers, cashiers, ride-hailing drivers, museum attendants and countless others who routinely come into contact with the public. SENT.

VIRUS OUTBREAK-TESTING: The Trump administration is scrambling to broaden testing for the coronavirus with a flurry of new measures. SENT; developing.

VIRUS OUTBREAK-HOSPITALS PREPARE: U.S. hospitals are setting up circus-like tents for testing, considering canceling some elective surgeries and calling on retired doctors for help as they brace for an onslaught of coronavirus patients. SENT.

VIRUS OUTBREAK-ITALY'S OVERWHELMED HOSPITALS: Italy is known for donating medical expertise and equipment abroad, but the coronavirus outbreak tearing through the country has turned it into a nation in need. Italy is at the epicenter of Europe's epidemic and on Friday it welcomed a team of experts and tons of ventilators, monitors and other medical equipment from China, the original source of the outbreak. SENT.

VIRUS OUTBREAK-SCHOOL MEALS: Millions of students across the U.S. may go without free lunches and breakfasts they receive at schools, as more districts decide to close due to the coronavirus. SENT.

ALSO:

VIRUS OUTBREAK-BRAZIL: Brazil’s President Jair Bolsonaro has tested negative for the new coronavirus, according to a post on his official Facebook profile. SENT.

VIRUS OUTBREAK-AIRLINES: Delta Air Lines will cut passenger-carrying capacity by 40% to deal with a nosedive in travel demand, and it is talking to the White House and Congress about assistance to get through the downturn. SENT.

VIRUS OUTBREAK-CHURCH SERVICES: Across the U.S., religious leaders are taking unprecedented steps in response to the coronavirus outbreak — canceling church services. closing church schools, waiving age-old obligations of their faiths. SENT.

VIRUS OUTBREAK-CASINOS: A Pennsylvania casino shut down temporarily, some Las Vegas casinos closed their buffets and the Hard Rock chain canceled live entertainment at all its U.S. properties for at least a month as the nation's casinos grappled with the coronavirus outbreak. SENT.

VIRUS OUTBREAK-MOVIE THEATERS: With few exceptions, movie theaters across North America are remaining open while Broadway theaters, sports arenas and museums close their doors to help curtail the spread of the coronavirus. SENT.

VIRUS OUTBREAK-BLARNEY STONE: The coronavirus outbreak that convinced the Irish government to shut schools and prohibit large gatherings has halted one of the country's cherished traditions. SENT.

VIRUS OUTBREAK-BOSTON MARATHON: The Boston Marathon has been postponed for five months due to the coronavirus pandemic. SENT.

DAYTON-DREAM DENIED: The coronavirus outbreak has abruptly roused the University of Dayton from its dream of a basketball season. The 29-2 Flyers were rolling into tournament play on a 20-game winning streak that had lifted spirits in an Ohio city battered in the past year by violent deaths and devastation. SENT.

INTERACTIVES/GRAPHICS:

Coronavirus vs The Flu: Graphic compares causes, transmission, vaccines, infections and deaths between influenza and Covid-19

Virus State Map: State by state count of confirmed cases in the U.S. Data is updated using official daily end of day report by Johns Hopkins CSSE.

Virus Global Spread (table): Table of countries which have confirmed cases of the virus. Table also includes when the virus was initially reported and the number of deaths by country.

Virus Global Spread (Map): Map of countries which have confirmed cases of the virus. Map also includes when the virus was initially reported and the number of deaths by country.

Virus Cases Compared Inside and Outside of China (Chart): Chart shows the number of confirmed cases in China over time and compares them to cases confirmed outside of China.

Virus Spread In China (map): Map shows the number of cases reported within China by province. Province data shows province population, confirmed cases, deaths and recovering.

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