Dhaka, Nov. 22 -- Leaders of the 20 biggest economies on Saturday vowed to ensure a fair distribution of Covid-19 vaccines, drugs and tests around the world and do what was needed to support poorer countries struggling to recover from the coronavirus pandemic.

"We will spare no effort to ensure their affordable and equitable access for all people, consistent with members' commitments to incentivise innovation," the leaders said in a draft G20 communique seen by Reuters. "We recognise the role of extensive immunisation as a global public good."

The twin crises of the pandemic and an uneven, uncertain global recovery dominated the first day of a two-day summit under the chairmanship of Saudi Arabia, which hands off the rotating presidency...