What does 2 Chronicles 26:21 mean?

Uzziah had leprosy until the day he died. He lived in a separate house, cut off from everyone, because he was unclean. His son Jotham took over the palace and ruled the people. 2 Chronicles 26:21 - Modern Text Bible

(Uzziah’s illness isolated him from society and leadership, and his son had to take over his responsibilities.)