The persistent syndrome of COVID-19 after-effects known as long COVID can develop after “breakthrough” infections in vaccinated people, a new study shows.
Researchers at Oxford University in the UK reviewed data on nearly 20,000 U.S. COVID-19 patients, half of whom had been vaccinated.
Compared to unvaccinated patients, people who were fully vaccinated – and in particular those under age 60 – did have lower risks for death and serious complications such as lung failure, need for mechanical ventilation, ICU admission, life-threatening blood clots, seizures, and psychosis. “On the other hand,” the research team reported on medRxiv on Tuesday ahead of peer review, “previous vaccination does not appear to protect against several previously documented outcomes of COVID-19 such as long COVID features, arrhythmia, joint pain, Type 2 diabetes, liver disease, sleep disorders, and mood and anxiety disorders.”
The absence of protection from long COVID “is concerning given the high incidence and burden” of these lasting problems, they added.
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