No. Endemic does not mean what you think it is does in a medical context. Yes it's probably never going away, but no it is not going to be endemic in that it will just be a background disease that never spikes.

Also, does something never go away suddenly make it okay in your eyes to give yourself a disease that will likely either:

• kill you
• give you brain damage and/or other serious health issues for what is likely going to be a much shorter, harsher life than if you had taken precautions

Like how does, "it's not going away" equal "i guess I should just give up and get airborne aids over and over again until it ruins or ends my life."