Wayne W. Dyer said this quote

Disease doesn’t exist. Instead of thinking of it as a disease – I’d like for you to think of it for a moment as energy, with a frequency. It is energy with a frequency that is inhabiting your body that is not in harmony with the frequency at which your body was created in association with God. It’s just an incompatible frequency that’s all it is. It’s just a frequency that if it continues to occupy your body, your body cannot survive.