Brennan Firstenberg first installed the project last fall at a site at D.C.'s Robert F. Kennedy Memorial Stadium, where she placed more than 267,000 flags before the exhibition ran out of space.
The most common symptoms after six months were fatigue, cognitive dysfunction and post-exertional malaise. Others included various pulmonary and cardiovascular issues.
More than 3,700 people with confirmed or suspected COVID-19 from 56 countries participated in the study. More than 90% of respondents had a recovery time that exceeded 35 weeks.
"A lot of post-COVID clinics in the UK have focused on respiratory rehabilitation. It’s true that a lot of people have shortness of breath, but they also have a lot of other problems and types of symptoms that the clinics need to provide a more holistic approach to," Athena Akrami, a neuroscientist at University College London and senior author of the study, told the Guardian.
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