A White House official has said the US will eventually require almost all foreign visitors to be fully vaccinated.
The unnamed official told several news agencies that the Biden administration had tasked inter-agency groups with creating a phased reopening for international visitors.
No timeline for the decision was given.
The US has seen a rise in cases, particularly among the unvaccinated, amid the spread of the Delta variant.
Current Covid-19 rules prevent most international travellers from entering the country.
