Now, a new study published on the preprint server medRxiv* in July 2020 reports the potential use of microclots in the plasma of COVID-19 patients as a rapid phenotypic test for the condition.

Apart from the delay inherent with the use of RT PCR on nasopharyngeal or oropharyngeal swabs, the procedure is unpleasant for most people, and some scientists question its sensitivity. Thus, a new and more rapid test with better sensitivity and increased prognostic significance would be welcome. This would help to triage patients for hospital admission or close surveillance based on the predicted severity of the disease at the time of presentation.

https://www.news-medical.net/news/20200731/New-simple-way-of-detecting-COVID-19-in-blood-plasma.aspx