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Nearly one in five patients who recovered from Covid 19 tested positive on a swab for a few weeks, especially if symptoms such as a sore throat still persist. It is the result of a study carried out by researchers from the Agostino Gemelli IRCCS University Polyclinic Foundation and the Catholic University, Rome campus, published in the American Journal of Preventive Medicine and carried out by Professor Francesco Landi from the Department of Aging Sciences. , Neurological, Orthopedic at the A. Gemelli IRCCS University Hospital and professor at the Faculty of Medicine and Surgery on the campus of the Catholic University of Rome.
131 patients with Covid-19 participated in the study: it was observed that 22 of the patients (16.7%), although they met all the criteria to end the quarantine (absence of fever and two negative swabs), had a positive swab again after two weeks. The likelihood of staying positive for SARS-CoV-2 is higher among those who still have symptoms.
The Agostino Gemelli IRCSS University Polyclinic Foundation has implemented a post-acute care service for recovered and discharged Covid-19 patients from the hospital to monitor their long-term health. Between April 21 and May 21, a total of 137 people officially recovered from Covid-19 participated in the study. Almost all the patients, 131, received a new swab in June.
Well, it emerged that several symptoms were still frequent in the recovered population: fatigue in 51%, respiratory difficulties in 44%, cough in 17%, regardless of the positive or negative result of the swab performed in June. The likelihood of continuing to test positive for SARS-CoV-2 after recovery was significantly high among those who still had respiratory symptoms, such as sore throat and rhinitis (symptoms similar to those of a cold).
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“This is the first study to provide reliable data on patients (16.7%) who remain positive for swab after recovery,” says Professor Landi. “These results suggest that a significant proportion of those cured may still be potential carriers of the virus. In particular, cured patients with persistent sore throats and rhinitis should avoid close contact, wear a mask, and possibly repeat an additional swab.” However, Professor Landi stresses in conclusion, “It is not clear whether the positive swab is necessarily indicative of the presence of the live virus and therefore infectious in the cured subject.”