This study helps us understand what we mean by long COVID better.
The study also observed the most prevalent conditions that occurred 31 to 150 days following the COVID-19 test.
Meanwhile, for hospitalized patients below 20 years old, anxiety and depression were the most prevalent new conditions.

Verywell / Jessica Olah
Like many viral diseases, COVID-19 causes inflammation in various organ systems.
The more severe or widespread the inflammatory response, the greater the disease severity, Hsu said.
Susceptibility to Breakthrough Infections
Patients with long COVID are also vulnerable to COVID-19 reinfection.
However, we need further research to determine whether they are more susceptible to it.
More studies are necessary to confirm this.
For the most recent updates on COVID-19, visit ourcoronavirus news page.
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Xie Y, Xu E, Bowe B, Al-Aly Z.Long-term cardiovascular outcomes of COVID-19.Nat Med.
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Centers for Disease Control and Prevention.Rates of laboratory-confirmed COVID-19 hospitalizations by vaccination status.