Booster shot surge

Seven-day average of daily vaccine doses by the date shots were administered. The first U.S. omicron case was confirmed on Dec. 1.

Note: "Full vaccinations" counts those who received a second dose of the Pfizer or Moderna vaccines or one dose of J&J. Source: CDC. As of Dec. 16. The most recent five days of data reporting are preliminary, according to the CDC, and are not included on this chart.