Yeah, this is one of the major plot holes in Zombie/Apocalypse movies.
<cough> The Last of Us </cough>
At least the TV series when they take the truck from the gay couple and drive it cross country. I didn’t play the game, so I don’t know if that happens in the game.
How are they concealing it? I have heard news reports citing the Gaza Health Ministry’s claims of tens of thousands of casualties since the war began. I believe they are correct (how many are non-combatants is debatable).
Anyone who is paying even a little bit of attention knows that many civilians are getting killed. Only a small minority seem to care.