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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The in-hospital death rate early in the pandemic was 31% but declined significantly within months.
Demand surges in pharmacy and hospital prescriptions reflect early changes in COVID treatment.
"We now have all the pieces in place for the rapid distribution of vaccines."
About 1.7 million Americans get vaccinated each day, and states receive 11 million doses a week.
The changes could have been due to lower illness incidence, medical care avoidance, or unaddressed care needs.
B117, a SARS-CoV-2 variant believed to have increased infectivity, is linked to high viral loads in COVID-19 patients in the United Kingdom, while a small number of patients with extremely high viral loads could have largely driven the second wave of the pandemic in Houston, according to two new studies in the Journal of Infectious Diseases.
Study authors are testing to verify the strain is not more infectious or faster growing than other strains.
Also, Walgreen's, Rite Aid, CVS, and other pharmacies start distributing COVID-19 vaccines.
An open-label study found the two supplements did not reduce symptom duration in outpatients.
In another encouraging trend, deaths have fallen for the second week in a row.
