This is the end.
The more robust zombies outlasted their predecessors, and at the end of the day outnumbered the living.
Some regions, however, were safer than others. Kudos to the dozens of regions which completely eliminated the infection while retaining hundreds of billions to trillions of survivors, to the several which sheltered hundreds of billions to trillions without closing their borders, and to the many regions with similar numbers of survivors. The full leaderboard is available for your perusal.
So long, and thanks for all the brains!