Asclepius didn't begin as a god, having said that. It's now assumed that he was an real historic figure, renowned for his healing talents. When he and his sons, Machaon and Podalirios, are talked about while in the Iliad in close to the 8th century BCE, they are not gods. https://maps.app.goo.gl/4RRJnUstxVnoZ5sQ8