Scientist John Pilgrim and his team have accidentally created a pathogen that is killing all living cells on Earth."
This game is good, basically you found a cure to cancer, but it turns out that cure is actually an aggressive disease that is killing everything.
I am quite surprised an angry mob doesn't kill you or burn down your lab.
The endings can be quite depressing. You die with your child, you commit suicide after your entire family dies, or you find a cure to the cure to cancer in which case only you and your child are the living survivors...(Yeah, you know what that means in order to reproduce humans?)