I am a Canadian who is wondering how soon after radiation treatments are over for breast cancer can one travel to Cuba? (Weeks, months?) Is there a particular amount of time one should wait to be in the sun?

As a Canadian getting back to you, I would suggest you address this question to the hospital radiology department where it was performed, or your own doctor. I am not a radiologist; we don't have any at AMHD, so this question cannot be answered.