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* Tedros hopes U.S. "will remain a friend of WHO"

* G-20 countries agree on debt holiday for poorest nations

* U.S. sees record increase in deaths for second day in a row

* Germany joins Spain and Italy in starting to ease lockdown

* Markets drop on U.S. retail slump, plunge in oil demand

By Stephanie Nebehay and Jeff Mason

GENEVA/WASHINGTON, April 15 (Reuters) - The head of the World Health Organization (WHO) said on Wednesday he regrets U.S. President Donald Trump's decision to pull funding for the agency, but that now is the time for the world to unite in its fight against the new coronavirus.

Trump's move prompted condemnation from world leaders as global coronavirus infections passed the 2 million mark.

The United States is the world's worst-affected country and its coronavirus death toll topped 30,000 on Wednesday, according to a Reuters tally. The fatalities have doubled in just a week and set a record single-day increase for the second day in a row.

New U.S. cases have been rising by about 25,000 a day, down from a peak of 35,000, according to a Reuters tally.

Trump said the data suggests the nation has passed the peak of new coronavirus infections and that he will announce guidelines for reopening the economy on Thursday.

After gradually becoming more hostile toward the Geneva-based WHO, Trump accused it on Tuesday of promoting Chinese "disinformation" about the virus, saying this had probably worsened the outbreak.

WHO Director General Tedros Adhanom Ghebreyesus told a news conference that the United States "has been a long-standing and generous friend of the WHO, and we hope it will continue to be so."

"WHO is reviewing the impact on our work of any withdrawal of U.S. funding and we will work with partners to fill any gaps and ensure our work continues uninterrupted," Tedros added.

Global health campaigner and donor Bill Gates tweeted that "Halting funding for the World Health Organization during a world health crisis is as dangerous as it sounds ... The world needs WHO now more than ever."

But Washington showed no sign of softening its stance, as Secretary of State Mike Pompeo pressed China's top diplomat on the need for full transparency and information sharing to fight the pandemic.

There was a sign of global unity among the Group of 20 major economies, including the United States, which agreed to suspend debt service payments for the world's poorest countries from May 1 until the end of the year. Meeting host Saudi Arabia said this would free up more than $20 billion for them to spend on their health systems.

MONEY GOING ELSEWHERE

The United States contributed more than $400 million to the WHO in 2019, roughly 15% of its budget.

A senior administration official said Washington would stop a $58 million "assessed contribution" that it was due to pay for 2020.

The United States also traditionally provides several hundred million dollars a year in voluntary funding tied to specific WHO programs. "That money will be spent with other partners," said a second senior Trump administration official.

The WHO has appealed for more than $1 billion specifically to fund operations against the pandemic, which reached 2 million confirmed cases on Wednesday, including more than 131,000 deaths, according to a Reuters tally.

New York City, center of the U.S. epidemic, revised its COVID-19 death toll sharply higher to nearly 11,000 - around a third of the overall U.S. total - to include victims presumed to have died of the disease but who were not tested.

But declines in hospitalizations and need for intensive care for coronavirus patients across New York state prompted Governor Andrew Cuomo to say on Wednesday that fears of its healthcare system becoming overwhelmed had not materialized.

Many of the hardest-hit countries have acknowledged that they are failing to register large numbers of coronavirus deaths among elderly people living in nursing homes, where testing is rare.

Data from Belgium indicated that almost half of its coronavirus-related deaths had occurred in nursing homes.

EASING THE LOCKDOWN

Spain and Italy, which have almost 40,000 coronavirus deaths between them, have begun this week to allow some non-essential businesses to reopen in the hope of reawakening locked-down economies nosediving into recession.

The WHO said the world stood at a "pivotal juncture" and countries that eased restrictions should wait at least two weeks to evaluate the impact before easing further.

Chancellor Angela Merkel said on Wednesday some shops in Germany could reopen next week and that schools would be allowed to open gradually from May 4, but that social distancing rules would remain in place for now.

But England's chief medical officer said that although Britain, with almost 13,000 deaths, was probably close to the peak of its epidemic, it was too soon to think about next steps.

Some 94 percent of Americans have been under government stay-at-home orders, but a top U.S. health official said governors of about 20 states spared the worst of the coronavirus outbreak may start reopening their economies by Trump's May 1 target date.

Trump is forming advisory groups on how to open up the country. On Wednesday, Amazon.com Chief Executive Jeff Bezos and Facebook CEO Mark Zuckerberg participated in White House conference calls, their firms said.

In a vivid reminder of the economic damage wrought by efforts to curb the health crisis, data showing the U.S. economy in a deep downturn and reports of persistent crude oil oversupply and collapsing demand sent global shares falling.

The MSCI gauge of stocks around the world fell 2.4% after the International Energy Agency forecast a 29 million barrel per day dive in April oil demand to levels not seen in 25 years, and U.S. retail sales plunged 8.7% in March.

On the bright side, 106-year-old Connie Titchen, thought to be the oldest patient in Britain to beat the coronavirus, was discharged from hospital.

"I feel very lucky that I’ve fought off this virus," she said. "I can’t wait to see my family."

(Open https://tmsnrt.rs/3aIRuz7 in a separate browser for an interactive graphic to track the global spread.)

(Reporting from Reuters bureaux across the world; Writing by Nick Macfie, Kevin Liffey and Lisa Shumaker; Editing by Robert Birsel, Philippa Fletcher and Bill Berkrot)