" A headline like this will leave many with the impression that contact tracing apps don’t work, not that they just haven’t gotten much buy-in." That would be

" A headline like this will leave many with the impression that contact tracing apps don’t work, not that they just haven’t gotten much buy-in." That would be an entirely accurate impression, contact tracing apps have a proven track record of not working so far. That one contributing factor is the lack of buy-in in the population does not detract from that point.