Skip to main content

False negatives in coronavirus testing are unavoidable but rare

Some patients are testing negative for the coronavirus even though they have it, and a D.C. doctor says it’s unavoidable but exceedingly rare.

“We’ve done hundreds of tests now, and we’ve seen a couple of negatives that when retested were positive,” said Dr. Gary Simon, chief of the Division of Infectious Diseases at The George Washington University’s School of Medicine and Health Sciences.

And while they do occur, “statistically, you’ll always see a false negative in any type of population. It’s impossible to say it’s 100%.”

As a result, someone who comes in with classic symptoms of the coronavirus but tests negative will be tested again.

Simon said the current thinking is that the nasal swab test could be more reliable than the oral test. But he stressed there’s not much data to back that up.

“It’s believed — without really good evidence — that nasopharyngeal testing is a little better than oropharyngeal testing,” Simon said.


More coronavirus news


Meet Sallie, a charming, lively and endlessly fun dog

Sallie went on a recent field trip and a group of people shared that she's an incredible dog. "We went on a hike, spent some time relaxing, and just enjoyed being outside together. Sallie was so calm, friendly, and sweet with everyone she met. She loved the water and treats, and she was always happy to explore or just hang out," they said.
Read Next Story