People with a history of hospitalization, diabetes, and higher body mass index were most likely to develop long COVID. (Photo:

While debate continues about what, exactly, “long COVID” means, new research from the University of California, Los Angeles, suggests that about one-third of all people treated for coronavirus develop what is now known as Post-Acute Sequelae of COVID-19 (or PASC).

“Long COVID” is the term generally used to describe COVID-19 symptoms that linger for 60 days or longer after infection or hospitalization. UCLA researchers studied 1,038 COVID-19 patients, tracking their progress between April 2020 and February 2021. Of those, 309 patients (29.8%) developed long COVID with symptoms continuing past 60 or 90 days, based on patient questionnaire responses. The most persistent symptoms were fatigue (30%) and shortness of breath (15%) in hospitalized patients and loss of smell (16%) in outpatients.

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