That's not surprising or particularly notable for a rapid antigen test, which is why they're not used as a full replacement for a PCR test in most countries.
The BD rapid test he used seems to be one which a paper [1] indicates has a lower positive percent agreement than a PCR test.
Rapid tests in general, compared directly to PCR, seem to do even worse with one paper [2] finding a symptomatic sensitivity of 72% and an asymptomatic sensitivity of 58%.
The BD rapid test he used seems to be one which a paper [1] indicates has a lower positive percent agreement than a PCR test.
Rapid tests in general, compared directly to PCR, seem to do even worse with one paper [2] finding a symptomatic sensitivity of 72% and an asymptomatic sensitivity of 58%.
[1]: https://pubmed.ncbi.nlm.nih.gov/33023911/
[2]: https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD...