What if?

What if the walking dead are zombies only in America and possibly the north and south American continents and there are normal people who don't have the virus problem in places like Australia or Japan or Mauritius or Fiji etc and are just living out their lives now with worry about the American continent but still without any issues. Dead die off without zombification.

And what if modern nations like Japan and Australia have a cure but it only works in their climates? And the only option for these TWD buffoons is to make it there and acclimate and then get their special serums.

Would make for an amazing ending... to finish out the lame crap TWD show on AMC