Let's Play Spider-Man 088 - The Answer 

I'd say Spider-Man's team up with the saturday night live cast in Marvel team up #74 is the weirdest

Well, that's a worst-case scenario for bioweapons, and for some reason, they are choosing to keep samples of it around rather than destroying it and reworking the design from theory. To answer your question, the most densely populated city is currently Manilla, with 43,064 inhabitants per square kilometer. However, according to a 1987 survey, Kowloon Walled City was the highest historically, with 1,255,000 inhabitants per square kilometer. Manhattan has about 28,868 inhabitants per square kilometer (NYC overall is 11,314 per square kilometer), so it is pretty high, not the global peak; the bigger concern is how many travelers pass through and will go on to other places in the world.

This is exactly the irony of this game about Devil's Breath, given that the covid pandemic hit so shortly after in the REAL world....