Biden says he and first lady will get COVID-19 booster

The big picture: The administration on Wednesday announced that Americans who received a Pfizer or Moderna vaccine should expect to be offered a booster shot eight months after their second dose.

• The move seeks to curb declining vaccine effectiveness over time as the Delta variant continues to spread nationwide.
• Officials are planning to offer the booster shots to eligible Americans starting the week of Sept. 20.
• A booster shot for individuals who received the single-dose J&J vaccine is also likely to be recommended, but officials are waiting for more data to come out over the coming weeks.

But some experts criticized the administration's guidelines for booster shots, saying COVID vulnerability can return as soon as five months after a second dose.

• The WHO argued that it's more important to give the doses to countries with lower vaccination rates.

Go deeper: Biden administration unveils plan for vaccine boosters starting in September