Title is somewhat misleading. Apparently these deaths were "potentially associated with the bug".
HackerNews commenters also note that the documentation provided by these meters explicitly call out that the user needs to be mindful of extreme readings and relate them to how they feel; then using a prick meter to check in situations where the reading is questionable. They also call out that the bug isn't on the side of the measurement scale near "death if incorrect reading" but on the "could be bad if not corrected long term" side.
So it's unlikely these deaths are all directly related to this bug.
Though obviously this is still bad, shame on Abbott, just not click-baity bad.