This site uses cookies to collect activity data and personalize content. By continuing to navigate this site, you agree to allow us to collect information using cookies. Learn more about how we care for your data in our privacy notice.


Screening for SARS-CoV-2 in close contacts of confirmed cases

A research study of close contacts of individuals with COVID-19 in Brazil finds that POC rapid antigen tests for SARS-CoV-2 are highly versatile and useful tools for combatting the COVID-19 pandemic. The study demonstrates the near immediate time-to-result of POC rapid antigen tests significantly offsets reduced sensitivity by enabling early identification of positive cases and decreasing onward viral transmission. In settings where RT-PCR is unavailable due to financial or infrastructure limitations, or where time-to-results is >4 days, close to 90% of individuals with Ct<34 could benefit from an earlier result via a POC test. Even in settings where PCR results are available within 24 hours, cumulative sensitivity of a POC test is >70%.

Publication date: February 2022

Screening for SARS-CoV-2 in close contacts of confirmed cases: Performance and operational considerations

380.2 KB PDF
View Resource