system
Given the following post, respond as if you're commenting on Reddit:
human
[The Walking Dead] Are human bites just as dangerous as walker bites? + How did nobody notice that it wasn't just the bite that turned the victim into a walker?

Since walker bites are apparently not the reason people come back as walkers, would that mean that if a regular human bit you, you'd be just as fucked as if a walker bit you? For example: When Rick kills Joe by ripping his throat out with his teeth. Even if Joe survived the bite, I assume he'd succumb to the same symptoms that he would if he had been bitten by a walker, right? 

On a side note. How did nobody notice that it wasn't the bites that were causing people to turn into walkers? What, did not a single person die of a heart attack during the initial outbreak? Did police just not notice that when they shot looters (I'm assuming they did),  they came back as walkers, despite never being bitten? Did doctors never even think to try their best antibiotics on bite victims? Human bites are pretty nasty, but you're not instantly doomed, and I'm sure that the US had a functioning healthcare service during the initial outbreak.
gpt
I'd assume that walker bites are lethal mostly because of all the diseases that they carry, not because of the zombie virus itself. If you got bitten by a person who never brushed their teeth and had massively decaying material on their teeth, there's a possibility that you'd succumb to the same symptoms that getting bitten from a walker would give you.

It all basically depends on how badly the wound gets infected by the bite. From a walker, the wound immediately gets massively infected, whereas a human bite is much less likely to be infectious and immediately lethal. As a side note, this is probably the same reason why people react to walker bites in very different ways. Dale got bitten and lived for a pretty substantial amount of time afterwards, while other people get bitten and turn pretty much instantly. It's all about how virulent the diseases on the teeth actually are.