How does Gustav von Aschenbach die in Death in Venice?

In the novella Death in Venice by Thomas Mann, the protagonist Gustav von Aschenbach dies from cholera.1

Aschenbach, a disciplined and revered author, becomes obsessed with a young boy named Tadzio while vacationing in Venice. Despite receiving warnings about a cholera epidemic spreading through the city, he chooses to remain, sacrificing his dignity and well-being to stay near the object of his fixation. His physical and moral deterioration culminates in his death, which occurs after he shares a final, significant look with Tadzio on the day the boy is scheduled to depart.12