The move to shorten the Pfizer booster interval comes as the U.S. shatters daily case records. The recommended interval for those who received Moderna or Johnson & Johnson vaccines has not changed.
People who test positive need to isolate themselves for 5 days if they don't show symptoms. The change reflects "what we know about the spread of the virus" and vaccine protection, the CDC chief says.
Most states are at the highest level of COVID risk and hot spots are emerging across the country as the omicron variant takes hold. Here are the latest numbers by state.
The Fenway Bowl and the Military Bowl were canceled after the University of Virginia Cavaliers and Boston College Eagles bowed out due to an insufficient number of players.
As researchers try to determine the severity of cases caused by the omicron variant, the question of what exactly constitutes mild, moderate and severe COVID is weighing on people's minds.
Americans are scrambling to find out if they're COVID-free so they can go through with their plans. But for many, that means queuing up for hours or tracking down scarce at-home testing kits.
Sporting events and live theater announced cancellations amid major increases in new coronavirus cases, in large part because of the omicron variant.
The virus is the enemy, NIH Director Francis Collins said. "It's not the other people in the other political party." Omicron, which could soon become the dominant strain, is extremely infectious.
NPR's Mary Louise Kelly speaks with Dr. Ashish Jha, dean of Brown University School of Public Health, about safely navigating the holidays amid rising COVID case numbers.
A new study from the University of Hong Kong offers preliminary information that could explain why this new coronavirus variant may be more transmissible.