United States President Donald Trump will sign an executive order to ensure that priority access for Covid-19 vaccines procured by the US government is given to the American people before assisting other nations, senior administration officials have said.

The Trump administration is confident it will have enough vaccine to inoculate everyone who wants a vaccine by the end of the second quarter of 2021, one official said, disputing a New York Times story that the government declined when Pfizer Inc offered in late summer to sell more vaccine doses to the United States.

One official said the executive order would lead to the formulation of guidelines for US government agencies to help other countries procure the vaccine once demand in the United States was met.