What did Sabu of Jungle Book die from?

The character "Sabu" from Disney's "The Jungle Book" is not a real person, but a fictional character. Therefore, he did not die from any cause.

There is a real person named Sabu Dastagir, an Indian actor who was known for his roles in adventure films, often playing a "jungle boy" type. He died in 1963 at the age of 39, but his cause of death was a heart attack.

However, it is important to remember that Sabu Dastagir and the fictional character Sabu from "The Jungle Book" are not the same person.