How much medicine does it take to be healthy?

This may sound a little sarcastic and unreasonable, but the purpose is genuine. Any paradigm shift or change in thought begins by questioning the status quo. It's surprising how often these questions lead to the answer, "I don't know".
It reminds me of the story of a woman making a roast. She begins by cutting the ends off both ends before placing it in the pan. Her daughter observes this technique and asks her mother why she cut the ends off. Her mother answers, "I don't know, that's just the way my mother always did it". The little girl goes to her grandmother and asks her to explain this roasting technique. The grandmother answers, "Because I never had a pan big enough for my roast!"
Healthcare is rooted in habit and tradition. The outside-in approach to health has been promoted for centuries, and has become the base upon which western medicine is built. The germ theory states that pathogens(bacteria, virus, parasite, fungus) cause disease in the body leading to symptoms. The solution is the introduction of a chemical (medicine) designed to either kill the pathogen OR decrease the severity of symptoms.
Back to my original question, how many drugs DOES it take to make a person healthy? How many vaccines does it take to help a newborn baby reach its full health potential?

Just some food for thought...