@JGoldman10,
Clearly, you still don't understand the complexities in developing a cure.
Many notable diseases and conditions that have affected far more people over a longer period of time have no cures: AIDS, all forms of cancer, polio, smallpox, influenza, ebola virus, bubonic plaque, etc.
Vaccines for polio and smallpox have been effective enough to basically eradicate the diseases in modern times.