Vaccination

Vaccine effectiveness lower for teens with predominant omicron

For adolescents, BNT162b2 vaccine effectiveness (VE) was lower against COVID-19-associated emergency department and urgent care encounters during omicron predominance, according to research published in the March 1 early-release ...

Health

CDC close to new guidance on COVID restrictions

Updated criteria to guide COVID-19 restrictions will be announced by the U.S. Centers for Disease Control and Prevention later this week or early next week, according to a CDC scientist involved in the process.

Diseases, Conditions, Syndromes

Booster shots needed against omicron, CDC studies show

Three studies released Friday offered more evidence that COVID-19 vaccines are standing up to the omicron variant, at least among people who received booster shots.

Diseases, Conditions, Syndromes

EXPLAINER: What does it mean for COVID-19 to be endemic?

Some European countries such as Spain are making tentative plans for when they might start treating COVID-19 as an "endemic" disease, but the World Health Organization and other officials have warned that the world is nowhere ...

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