Health is not one concepts but a number of concepts put together. It can have to do with how long you live, how you feel when you are living, your mental, physical and emotional state and so on. These are some of the concepts people think of when talking about health.
Did a person have a healthier life living to 120 but be being sluggish and sick most days or vibrant and alert until a painless death at 90?
Are you healthier with a Broken leg or a cold, depression or with cancer.
When we talk about health we are not talking about one thing but a number of concepts that we group together even if they are not easily compared or agreed on by all people.