What is the math that leads you to saying 12-18 months?

A particular medication I am on has a life expectancy of that time frame.

I like how I was downvoted here by some number crunchers for bringing a bit of humanity to the discussion. I guess I should have mentioned something about javascript and an illegal business plan (uber, airbnb etc)

No, it sounds like you're saying that you're older and therefor at higher risk. Just say your age for context.