Cape Town (South Africa), Jun 11 (AP) US plans to donate 500 million more COVID-19 vaccines to developing countries were met Thursday with both celebration and hesitation amid questions over whether the effort will be enough to help poor regions desperate for doses.

Some health officials and experts expressed hope that the pledge would encourage more donations to ease the inequities in vaccine supplies that have become pronounced in recent months. Other observers stressed that the doses needed to roll out quickly.

“Saving lives requires shots in arms now. Not at the end of 2021, not in 2022, but now,” said Kate Elder, senior vaccines policy advisor to the Doctors Without Borders organization.

The donated vaccines “better come in sufficient volumes and urgently.”

Hours after US President Joe Biden's administration committed to the donation, British Prime Minister Boris Johnson announced that the Group of Seven nations were set to share at least 1 billion coronavirus shots with the world, with half coming from the US and 100 million from the UK.

The announcement on the eve of the G-7 summit in England previewed a coordinated effort by the world's advanced economies to make vaccination available everywhere.

The first 200 million doses from the US will start to arrive in countries in August, the White House and manufacturer Pfizer said, with the rest following in the first half of 2022.

Inoculation campaigns in several richer countries have surged ahead while efforts have barely begun in many poorer nations. The recent surge in cases in India offered a searing reminder of how COVID-19 can devastate entire countries when vaccines are scarce or nonexistent.

“We've seen that the virus is not over. It might feel like it's nearly over for some of us living in countries where we're lucky enough to have been vaccinated. But in other parts of the world, the virus is still absolutely raging out of control," said Lily Caprani, head of vaccines advocacy for UNICEF.

The Biden administration's decision to donate Pfizer vaccines raised doubts about whether the doses would reach the poorest of the poor because those doses need to be stored in ultra-cold conditions. Many low-income countries with limited infrastructure will probably be unable to take them to their most remote areas.

The Africa Centers for Disease Control and Prevention said it would advise its countries to use the Pfizer shots in major cities.

Still, the administration's promise was “clearly a cause for celebration,” said Dr John Nkengasong, director of the Africa CDC, particularly at a time when infections are increasing on the continent of 1.3 billion people, and some countries still have not administered a single dose.

“Absolutely, it's going to be a big help,” Nkengasong said.

The donation of the Pfizer shots is crucial because the global disparity in vaccination has become a multidimensional threat: a human catastrophe, a $5 trillion economic loss for advanced economies and a contributor to the generation of mutant viruses, said Jerome Kim, head of the International Vaccine Institute, a nonprofit dedicated to making vaccines available to developing countries.

The US will work with the global COVAX vaccine alliance to deliver the shots.

The G-7 summit might also give an indication of whether and how far other nations in the elite club are willing to follow the US and the UK on vaccine sharing. Richer countries have been the focus of widespread criticism that they have fallen woefully short of lofty promises of fairness when the vaccines were being developed.

Germany and France have each promised to donate 30 million doses by the end of the year.

The gaps in vaccine access are clear: The US and Britain have fully vaccinated more than 40% of their populations, according to a global tracker kept by Johns Hopkins University. Countries like Haiti, on America's doorstep, Burundi and many others have vaccinated few, if any, of their people. (AP)

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