Healthspan is how long you live free from serious illness, while lifespan is...

https://mill-wiki.win/index.php/Why_Are_Purpose_and_Connection_Grouped_Together_in_This_Longevity_Framework%3F

Healthspan is how long you live free from serious illness, while lifespan is total years lived. Globally, there's a 9.6-year gap between these two, and in the US, it’s even wider at 12.4 years