The United States has been in a "protracted health crisis" for decades, the researchers say.
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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New data show the Omicron variant spreads more easily by asymptomatic people.
Those who got a third dose had 12.8 cases per 100,000 person-days, vs 116 in the unboosted.
Yesterday the US reported 1.35 million new COVID-19 cases, the most any nation has ever reported in 1 day.
US Federally qualified health centers (FQHCs) have been critical to providing COVID-19 vaccinations to low-income and racial minority populations, finds a study yesterday in JAMA Network Open.
As hospital bed occupancy nears record levels, a quarter of US hospitals report critical staffing shortages.
The vaccine was 91% protective against MIS-C, a rare inflammatory disorder.
T cells induced by infection with coronaviruses such as those that cause the common cold might help protect against COVID-19, finds a small UK study today in Nature Communications.
Only 15% of younger children are vaccinated, compared with more than half of adolescents.
In another study, researchers found a third vaccine dose boosts immune response in cancer patients.
Countries took new steps to slow the spread, and new UK data show boosters provide strong protection against severe Omicron infection.
