FALMOUTH, England — Rich nations must do more than just donate surplus vaccines if they hope to end the COVID-19 pandemic, according to public health experts and humanitarian groups that are calling for money, increased production and logistical support to help developing countries where the virus is still raging.

The appeal came after U.K. Prime Minister Boris Johnson said he hoped leaders of the Group of Seven major industrialized nations will agree to provide at least 1 billion vaccine doses for poorer countries. The G-7 leaders, who are holding their annual meeting this weekend in Cornwall, southwest England, continue to debate other forms of aid to get lifesaving vaccine shots into arms.

While almost half of the combined population of the G-7 nations has received at least one dose of vaccine the worldwide figure is less than 13%. In Africa, it’s just 2.2%.

Wealthy nations must act quickly not just out of altruism, but to protect their own citizens, because the virus will continue to mutate as long as it is allowed to spread unchecked, resulting in potentially more dangerous variants, said Lily Caprani, head of COVID-19 vaccines advocacy for UNICEF.

“[This] requires political will and urgent action now,” Caprani told The Associated Press. “So I think all of us should be urging our leaders to do it, not just because it’s the right thing to do, but it’s

the smart thing to do, and it’s the only way out.”

Johnson, who is hosting the G-7 summit, and U.S. President Joe Biden opened the meeting by announcing that their countries would donate a total of 600 million vaccine doses over the next year.

But International Monetary Fund economists recently estimated it would cost $50 billion to vaccinate 60% of the world’s population by the middle of next year and that achieving that goal would generate $9 trillion in additional economic output by 2025.

Those appealing for wealthier nations to do more to make vaccines available worldwide argue it would be a worthwhile investment in human capital.

“If we do this, and everyone’s saying it’s the deal of the century, about 60% of those resources need to come from wealthy countries in the G-7,” said Robert Yates, director of the global health program at Chatham House, a Londonbased public policy

think tank.

Countries like the United States and Britain secured supplies of multiple COVID-19 vaccines while they were still in development, hoping to guarantee shipments of any successful candidates. That left them with enough doses to inoculate their entire populations two or three times over after regulators approved a number of shots.

They are now under pressure to provide shots for low-income countries immediately and not wait until they have vaccinated younger age groups in their own countries. COVID-19 poses the greatest risk to older people and those with underlying health conditions, who account for the vast majority of those who have died from the disease.

Ahead of the G-7 meeting, the IMF, the World Health Organization, the World Bank and the World Trade Organization said the group’s top priority should be ending the pandemic and securing the global economic recovery.