The delay, narrowed approval, and extra study steps raise concerns about the status of and potential added requirements for other COVID vaccines.
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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COVID-19 may act as a disease accelerator, amplifying the risk of a diabetes diagnosis that may have come later in life.
The drug was linked to a reduced 28-day all-cause death rate and fewer emergency department visits for clinically significant relapse.
Antibiotic prescribing for upper respiratory tract infections increased in the 2 years after COVID-19 lockdown measures were implemented.
The consequences of sticking with current dogma included the loss of many lives and huge economic repercussions, experts say.
The XBB.1.5 subvariant is now dominant in most US regions as a decline in infections appears to be leveling off.
Death rates among unvaccinated people were 14 times those of bivalent vaccine recipients.
Twenty-five patients (2.7%) in the interferon group were hospitalized or visited an emergency department, compared with 57 (5.6%) of placebo recipients.
Three vaccine doses were 73% effective against maternal Omicron infection and 80% effective against infant Omicron hospitalization.
Subvariant patterns are in flux, with BA.5 Omicron lineages still dominant, but XBB.1.5 gaining ground.
All genomes belonged to the existing 123 Pango lineage, demonstrating no persistently dominant SARS-CoV-2 variants or new strains.
