Great update! A few things that I would add/change:
1: Right now the loss animations are tied to location. I think instead on your first loss, you get the tentacle scene; then, if you are still infected when you lose again, you get the spreader scene (or whatever would go there instead). Just a bit of logical consistency.
2: Related to above, if you see the spreader scene, there should be a chance that a spreader respawns somewhere in the area. Chance could be based on difficulty, but this could mess up game balance on harder difficulties.
3: When you first meet Clarissa, if you're infected, you die. Makes sense. If you meet Clarissa, then go get infected, then talk to her to get tested, nothing happens. Maybe there should be a special Bad End where you infect her, then there's a end screen of both of you as Burgeons? Or she could shoot you as well, that also works.
10/10 update overall though. Keep up the good work!