I don't know if this has been discussed since I'm new, but I'm confused on how the infection is spread. We know that getting bitten does it, and in the beginning being splattered or ingesting blood did it too. I was re-listening, however, and when Riley and Angel were in the arena they were in piles of the dead monsters for hours. Riley got juices in her eyes and mouth and I assume Angel did too. Can the infection not be spread by the dead bodies? Do they need to be living/fresh remains in order to spread it?