I had a blood transfusion about 8 yrs ago and my heart is super healthy. I regularly get my cholesterol and bp checked. There are risks to everything in life. It doesn't mean we should be paranoid about it. The benefits in the long run outweigh the risks!
It's like saying I'm not going to drive today because there's a chance I may get into a car accident and die. We can't live life with that sort of mentality.