Breakthrough Covid infections show ‘unvaccinated putting the vaccinated at risk’ (pbs.org)

"She discouraged organizations — like pro baseball teams — from doing surveillance testing among vaccinated people without symptoms, saying “it probably does more harm than good” in eroding public confidence."

I'd say testing asymptomatics in 2020 (pre-vaccines) should retrospectively be applied too, to maintain public confidence.

??? How can unvaccinated people be a threat to vaccinated people, if vaccines work?