What is a real meaning of 『Being HEALTHY』to you?

Does being healthy mean you are not feeling any symptoms of illness? 

Not really.....

Being truly healthy is to have a body which will not fall sick. 
We would like you to graduate you, when you regain your health.

After your graduation, it is recommended to have a periodic maintenance, just like your car needs a tune up. Or in case you encounter some event your body received shocks, then quicker the better to get aligned for preventive reasons.