If I have a communicable disease that my doctor misdiagnosed approximately 1 year ago and I have unknowingly passed this disease to others, what are the legal ramifications?

Based upon what you have written the ramification for the treating physician for the misdiagnosis as to you is a medical malpractice action by you. As to what you could be subjected to are lawsuits for negligence and payment of any damages as to those that you gave the comminicable disease to.

I suggest that you consult with a personal injury attorney about your matter.