I have a big doubt, when does cumflation happen? and how can i progress in the game
Infected Scientist.
Surrender to them.
In the Abandoned Warehouse you got a "Logbook" go to your Inventory and press that, should tell you what you have done, and haven't.
Lastly in the Slums Market you can go to the back to a ("!") Go there and you will find a Fortune Teller.
I understand, thank you