These nasal disturbances “appeared principally before or during the other symptoms of COVID-19”. On average, the nasal symptoms lasted for 12 days.
The researchers concluded: “The presence of these nasal symptoms, and their early occurrence, could potentially facilitate early diagnosis of COVID-19.”
It must be noted that this body of work was published as a pre-print research paper.
This means the study is yet to be peer-reviewed, meaning various experts are yet to assess the research.