system
Given the following post, respond as if you're commenting on Reddit:
human
[ELI5]: What's going on with Fidel Castro?

Is he dead, is he alive? whats the deal with all the secrecy surrounding his appearance in cuba?
gpt
He's alive but retired. He's appeared in public this year (most notably at the Party congress in April), so we're pretty certain he's not dead. They're having him keep a low profile, probably to give Raul more legitimacy. He also might still be sick, but it's hard tell with a guy that old (85).

TL;DR - Not much.