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What are the origins of cancer? Is it healable? What is required for that to happen on a large scale?
From the informations I could gather along my journey, there are many possibilities for the origin of a disease :
-A contract, you decided to experience disease to feel "how it is" (yeah that's kind of a hard lesson to put upon yourself)
-Another contract to clean up ancestral or collective karma via suffering ( this can very often be cleaned energetically, this is a shortcut to healing that is when you see people with convulsions or tremors during sessions )
-An emotion/trauma setting your vibe so low, that you catch a disease ( disease could be cleared up with raising ones vibration, but that's hard to do )
-Genetic markup (kind of the same stuff of ancestra karma in a way, I believe this can be cleaned up too )
-Toxic or low quality food/diet ( that lowers your vibration, that is kind of like the "emotion" lowering your vibe )
-Toxic product in your body (lead teeth filling , paint ingestion etc. )
There are probably many other ones, I don't know the full list.