1.
Clin Infect Dis
; 72(2): 323-326, 2021 01 27.
Article
in English
| MEDLINE | ID: covidwho-1050128
ABSTRACT
Using data for 20 912 patients from 2 large academic health systems, we analyzed the frequency of severe acute respiratory syndrome coronavirus 2 reverse-transcription polymerase chain reaction test discordance among individuals initially testing negative by nasopharyngeal swab who were retested on clinical grounds within 7 days. The frequency of subsequent positivity within this window was 3.5% and was similar across institutions.