The United States is further ramping up its vaccination programme, which has accelerated since Joe Biden took office in January, APA reports citing BBC.
The Biden administration says all adults will be eligible for a jab by 19 April - almost two weeks earlier than the previous target.
President Biden is expected to speak about the vaccination effort later today.
White House press secretary, Jen Psaki, tells reporters: "The president will announce officially later this afternoon that we've reached 150 million shots in arms since entering government and that by 19 April all adult Americans will be eligible to get the vaccine.
"That doesn't mean they will get it that day, it means they can join the line that day if they have not already done that beforehand."