Family PracticePulmonologyInternal MedicineCritical CareEmergency MedicinePathologyGeriatricsGeneral HealthScreeningVirusesInfectious DiseaseCoronavirus
HealthDay operates under the strictest editorial standards. Our syndicated news content is completely independent of any financial interests, is based solely on industry-respected sources and the latest scientific research, and is carefully fact-checked by a team of industry experts to ensure accuracy.
- All articles are edited and checked for factual accuracy by our Editorial Team prior to being published.
- Unless otherwise noted, all articles focusing on new research are based on studies published in peer-reviewed journals or issued from independent and respected medical associations, academic groups and governmental organizations.
- Each article includes a link or reference to the original source.
- Any known potential conflicts of interest associated with a study or source are made clear to the reader.
Please see our Editorial and Fact-Checking Policy for more detail.Editorial and Fact-Checking Policy
HealthDay Editorial Commitment
HeathDay is committed to maintaining the highest possible levels of impartial editorial standards in the content that we present on our website. All of our articles are chosen independent of any financial interests. Editors and writers make all efforts to clarify any financial ties behind the studies on which we report.
WEDNESDAY, Sept. 9, 2020 (HealthDay News) -- The median time from COVID-19 symptom onset to viral clearance is 36 days, according to a study published online Sept. 2 in BMJ Open.
Pamela Mancuso, from the Azienda USL-IRCCS di Reggio Emilia in Italy, and colleagues conducted a population-based cohort study on archive data involving 1,162 individuals testing positive with reverse transcription-polymerase chain reaction on nasopharyngeal swabs and diagnosed with COVID-19.
The researchers found that 60.6 percent of the patients achieved viral clearance, with a median time of 30 and 36 days from diagnosis and symptom onset, respectively. Overall, 78.7 percent of those who were negative and retested had viral clearance confirmation, indicating one in five false negative tests. With age, there was a slight increase in the time from symptom onset to viral clearance, from 35 days in those younger than 50 years to 38 days in those older than 80 years; an increase in time from symptom onset to viral clearance was also seen with disease severity, from 33 to 38 days in nonhospitalized and hospitalized patients, respectively. After 34 days from symptom onset, the probability of confirmed viral clearance reached 86.8 percent and increased with time, even after adjustment for age and sex (odds ratio, 1.16 per day from diagnosis).
"To avoid generating secondary cases, either the isolation period should be longer (over 30 days from symptom onset) or at least one follow-up test should be done before ceasing isolation," the authors write.
This story may be outdated. We suggest some alternatives.
The content contained in this article is over two years old. As such our recommendation is that you reference the articles below for the latest updates on this topic. This article has been left on our site as a matter of historic record. Please contact us at firstname.lastname@example.org with any questions.
Updated on May 25, 2022
Read this Next
Other Trending Articles