The combined vaccine elicited higher immune response against SARS-CoV-2.
Plaque growth can lead to a higher risk of heart attack, stroke, and other life-threatening cardiovascular events for as long as 1 year.
Post-exertional malaise, or exercise intolerance, was seen in 36% of those with long COVID.
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Experts say virus introduction through an intermediary host species is the most likely of 4 scenarios they presented.
Few preschoolers attending 22 daycare centers in France last spring had SARS-CoV-2 antibodies in their blood.
In another sign that a former hot spot is recovering, New York City restaurants can soon resume indoor dining.
A study today in mBio offers support to continue breastfeeding infants even when mothers have mild to moderate COVID-19 infections. The study showed breastmilk samples did not contain SARS-CoV-2 (the virus that causes COVID-19) RNA, but the authors suggest risk of transmission via breast skin to baby should be evaluated.
The B117 SARS-CoV-2 variant will dominate other strains in the coming weeks, study authors say.
An official says the pause is needed to collect more data, especially on vaccine impact on severe disease.
"We are committed to wearing masks still for the 100 days of the presidency," CDC Director Walensky says.
A study today in Nature Medicine showed Pfizer's mRNA vaccine, the first vaccine approved in the United States for use against COVID-19, neutralized three variants of the virus, including the B117 strain first identified in the United Kingdom, and two new variants first confirmed in South Africa.
In light of the request, FDA advisors will meet on Feb 26 to weigh emergency use.
For men with COVID-19, the risk of dying from an out-of-hospital cardiac arrest rose 4.5-fold.
