Sri Aurobindo / Satprem : The Adventure of Consciousness : Independence from Illnesses.

We should also remember that a bad inner state is contagious; associations with certain people always tend to attract accidents or troubles. After we have had the same experience ten times or a hundred times – which might be anything from catching a cold to tripping on the stairs to having a serious accident, depending upon our inner state – we will finally realize that neither our own self no so-called chance has anything to do with all this, and that the remedy lies not with any drug, but with restoring the true attitude, the inner order – in other words, with consciousness. If the seeker is conscious, he can live in the midst of an epidemic or drink all the filth of the Ganges River if he pleases; nothing will touch him, for what could touch the awakened Master? We have isolated bacteria and viruses, but we have not understood that these are only external agents; the illness is not caused by the virus but by the force behind that uses the virus. If we are clear, all the viruses in the world cannot do anything to us, because our inner force is stronger than that force; the vibration of our being has too high an intensity for that lower vibration to enter. Only like can enter like. Perhaps cancer will be cured or will disappear the way other medieval diseases have, but we still will not have eradicated the forces of illness, which will simply use something else, another agent, another virus, once their present vehicle has been exposed. Our medical science touches only the surface of things, not the source. The only disease is unconsciousness. At a later stage, when the inner silence is well established and we are capable of perceiving mental and vital vibrations as they enter our circumconscient, we will similarly be able to feel the vibrations of illness and drive them out before they can enter us: If you can become conscious of this environmental self of yours, Sri Aurobindo wrote to a disciple, then you can catch the thought, passion, suggestion or force of illness and prevent it from entering into you.

Source : https://aurobindo.site/workings/satprem/adventure_of_consciousness_e.htm#026