If adopted, the proposal would "ban export restrictions on these foodstuffs which hinder the World Food Programme's ability to procure (food products for) the populations most in need across the world."
The sero-prevalence study, presented late on Tuesday, is now in its fourth round. Its work involved carrying out rapid antibody tests on 51,409 people across the country of some 47 million people between November 16 and 29.
In Vietnam, CARE's country director Le Kim Dung said the pandemic had made it harder to bounce back, particularly in rural areas, from widespread floods that had inundated many provinces hit by heavy rains and a series of typhoons since early October.
"As the virus seemed to be contained in terms of community transmission, our most exposed areas are principally around our borders... we may be an island but we are not totally isolated from the pandemic that is raging across the world," he said.
The US Federal Reserve is expected to keep interest rates pinned near zero and to signal where rates are headed in the coming years at it's final policy meet of the year. The Fed's policy statement is due at 1900 GMT.