The US is communicating regularly with India in bilateral and multilateral channels to discuss the supply of Covid-19 vaccines and inquire about its timeline for restarting vaccine exports, a senior Biden administration official has said.

The global pandemic will be a key topic on September 24, when US President Joe Biden will host the first in-person summit of leaders of the "Quad" countries — Australia, India, Japan and the US.

The visit by Prime Ministers Scott Morrison, Narendra Modi and Yoshihide Suga to the United States will coincide with the United Nations General Assembly session in New York, which Biden will address on September 21.

The administration official said Washington was staying in close touch with India and other Quad partners about the vaccine partnership, and "any factors that may affect this project or global vaccine supply," but those discussions were not tied to a specific summit or engagement.

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