US President Joe Biden is to announce that all adults across the United States will be eligible for Covid-19 vaccines by 19 April - well ahead of the already ambitious previous target.
The White House said Mr Biden is shifting the deadline for full eligibility from 1 May to 19 April after rapid progress in all 50 states in the vaccine roll-outs.
A senior administration official, who did not want to be identified, said the announcement would be made by the president later today.
If the target is met, this would mean an end to restrictions by age, health issues or other categories for people wanting to get coronavirus vaccines.