antigen antigen
Stories About

antigen

Rapid antigen tests are ubiquitous, but some Americans have learned the hard way that a negative test result isn't necessarily the final word. Mahmoud Illean/AP hide caption

toggle caption
Mahmoud Illean/AP

Is it time for a reality check on rapid COVID tests?

  • Download
  • <iframe src="https://www.npr.org/player/embed/1149672577/1150075892" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

An illustration shows spiky antigens studding the virus's outer coat. Tests under development that look for these antigens might be faster than PCR tests for diagnosing COVID-19, proponents say. But the tests might still need PCR-test confirmation. Sergii Iaremenko/Science Photo Library/Getty Images hide caption

toggle caption
Sergii Iaremenko/Science Photo Library/Getty Images

A Next-Generation Coronavirus Test Raises Hopes And Concerns

  • Download
  • <iframe src="https://www.npr.org/player/embed/847416695/848179380" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript