1.
Infect Control Hosp Epidemiol
; 42(10): 1257-1259, 2021 10.
Article
in English
| MEDLINE | ID: covidwho-1541092
ABSTRACT
We performed a prospective study of 501 patients, regardless of symptoms, admitted to the hospital, to estimate the predictive value of a negative nasopharyngeal swab for severe acute respiratory coronavirus virus 2 (SARS-CoV-2). At a positivity rate of 10.2%, the estimated negative predictive value (NPV) was 97.2% and the NPV rose as prevalence decreased during the study.