The leaders of the US, Japan, India and Australia have vowed to work together for a free and open Indo-Pacific region at their first in-person summit, amid shared concerns about China.
The so-called Quad group of nations agreed to move ahead on a joint plan to provide Covid-19 vaccines around Asia.
They also launched a climate initiative pledging to “decarbonise at pace” and “keep climate goals within reach”.
The four nations will hold annual summits.
Indian Prime Minister Narendra Modi said at the White House summit that his country would resume exports of coronavirus vaccines next month.
“This is an immediate delivery from the Quad into the Indo-Pacific region,” Indian Foreign Secretary Harsh Vardhan Shringla told reporters, vowing to supply “quality and affordable” vaccines.