A new study has found that nearly one-third of people who reported having "mild" cases of COVID-19 still experience lingering symptoms up to nine months later.
In a letter published last week in the JAMA Network Open, researchers from the University of Washington conducted a study with 177 adults who had "laboratory-confirmed" cases of SARS-CoV-2 infection, which is the virus that causes COVID-19.
While 11 participants were asymptomatic and another 16 had moderate or severe cases, 150 were outpatients with "mild illness" who did not require hospitalization.
All participants filled out surveys about their lasting symptoms, which were completed 3 to 9 months after their symptoms began.
Nearly one-third of outpatients and those who had been hospitalized reported experiencing at least one "persistent symptom, lipitor liver check " according to the study.
Fatigue was the most commonly reported symptom, occurring in 14 percent of participants. Other symptoms included continued loss of smell or taste and brain fog. Less than 10 percent of patients, the majority of which had not been hospitalized, also "reported negative impacts on at least 1 activity of daily living, the most common being household chores."
"Our research indicates that the health consequences of COVID-19 extend far beyond acute infection, even among those who experience mild illness," researchers wrote, noting that additional long-term studies will need to be performed "to fully understand the impact of this evolving viral pathogen."
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Researchers noted that their findings were consistent with a previous Centers for Disease Control and Prevention report, which was published last May. However, that report examined symptoms lasting between 14-21 days after a positive test result.
Another study published last month found that out of 1,733 hospitalized COVID-19 patients in Wuhan, China, 76 percent were still experiencing at least one symptom after six months.
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"It's very hard to predict who will get these symptoms," Dr. Zijian Chen, the medical director of New York City's Center for Post-Covid Care at Mount Sinai Health System, told CNN.
Chen went on to add that the patients treated at the center are "of all races" and "span in age from the 20s to 70s and 80s."
Noting that treatment for each individual needs to be tailored to their specific needs, Dr. Christian Sandrock, who assesses patients at UC Davis' Post-COVID-19 clinic, stressed the importance of "supportive care."
"That really involves better living and higher quality living, for lack of a better term. But that means you really need sleep," Sandrock told CNN. "We want people to really be patient with themselves, know that it's going to take a lot of time as they work through it. So that, I think, is key."
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