The deadliest disease you can get is ischemic heart disease also known as coronary artery disease.
The disease that kills the most in the world is heart disease which is the leading cause of death for both women and men in the U.S and worldwide.
More than half of people that die as a result of heart disease are men.
The disease that has killed the most ever is the Spanish Flu also known as the Influenza A/H1N1 virus.
Other diseases that have killed the most are the Bubonic Plague and HIV/AIDS.
The disease that has the lowest survival rate is rabies.
If you become infected with Rabies it can be fatal very quickly if you don't get treatment.
If you've been bitten by a dog you should get a rabies vaccination even if you don't know if the dog has been infected with rabies.
Other diseases that have the lowest survival rate include Creutzfeldt–Jakob disease and all its variants, fatal insomnia, kuru, Gerstmann–Sträussler–Scheinker syndrome, Variably protease-sensitive prionopathy and others.
No cases of survival, invariably fatal.
Other deadliest diseases in the world include.
Ebola virus. Ebola virus is a highly contagious and often fatal virus that causes Ebola virus disease (EVD) in humans.
HIV/AIDS.
Tuberculosis (TB).
Malaria.
Influenza.
Coronavirus.
Of all the diseases suffered by humans, Smallpox is the only one to be completely eradicated from the face of the Earth.
This success was made possible in large part because smallpox is a uniquely human disease that has no known animal or insects carriers.
The rarest disease in the world is Ribose-5-Phosphate Isomerase.
Ribose-5-Phosphate Isomerase (RPI), is a crucial enzyme in a metabolic process in the human body.
This condition can cause muscle stiffness, seizures, and reduction of white matter in the brain.