1, smallpox
I believe many people who study history will remember smallpox, because smallpox was an incurable disease in ancient times with a very high incidence. Most importantly, once you get smallpox, it is very likely that this person will declare that life is not far away. Only a few people can survive after suffering from smallpox, but with the emergence of vaccines, smallpox has been overcome.
2. AIDS
Although from now on, AIDS is still an incurable disease, but with the development of science and technology, human beings have reached the level of fighting AIDS, and the condition can be stabilized at a balanced level. Aids, like diabetes, cannot be cured, but it can be controlled by certain medical means.
3. Some tumors
When it comes to tumors, everyone will definitely look pale, because from the current medical point of view, malignant tumors are still the most difficult disease to cure, but with the development of science, a small number of tumors have been conquered by human beings, even malignant tumors can be well controlled.