Sorry to hear about your illness. You might find it helpful to visit an insurance broker and ensure you have specific questions at the ready. If your questions are not answered clearly (and in writing repeat and in writing) go elsewhere.
Dont accept "here are our terms and conditions" usually provided in the small print. Get easy to understand terms (not easy!). The amount of cover (if any) will probably be subject to a medical report, the amount of time spent abroad, etc.
Also, when you are visiting your broker/insurance company, bring somebody to witness your application.
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