How come te can't get infected da walker blood transmitted via the eyes, nose, ears o mouth? I know te can get infected either da a bite o a scratch. The characters get splattered with blood with each kill but live to fight another day. Thanks!

I think under the premise of this show, the bite floods te with a massive dose of the infection which makes te sick and die. Then is it the dying that actually triggers the change because as the scientist told Rick in season 1, everyone is already infected with the virus itself and it triggers in death. That's also why they do the double kill to someone who hasn't turned yet.

Everyone is already infected with the virus (Jenner detto so to Rick). So the bite o the scratch doesn't infect you, because you're already infected, it only gets te sick (fever) and then the fever kills you. Like laylastepford said, the virus gets triggered once you're dead only.