Crumble
I can't really be bothered to do your research for you, but:
Small pox has been eradicated worldwide (do not underestimate how important this has been to our species).
Large parts of the world are now free of polio - we are very close to eradicating this entirely.
This is also the case with measles, diphtheria, malaria, hookworm, rubella, and BSE. Like anything in science, it's a progression & if anything is holding up complete eradication of these, it is superstition & woo, and the ignorant, anti-science rubbish spouted by people like you.
You also have to take into account the treatments & medicines that prevent deaths that used to be common - bacteria killed millions and millions of people. Fighting them with antibiotics has saved more lives than can be counted.
Diabetes & asthma - once major, major killers - are mostly controllable now.
Fairly routine surgeries now save people from situations that would almost certainly have killed them a few centuries ago - caesarian sections, appendectomies, tonsillectomies and so on.
Understanding of germ theory has made surgery infinitely safer. Modern anaesthetics has allowed highly invasive procedures to take place that would have killed people previously - heart surgery, transplants etc.
As every year passes, the cure rate for cancer is steadily rising. Early diagnosis is getting better & treatments are becoming more effective.
My mother had cervical cancer. She was cured.
I was saved from a life-threatening ectopic pregnancy when I was 21.
My son had asthma attacks severe enough to require hospitalisation more than once in his childhood.
If either three of us had relied on a bottle of water that might, perhaps, contain a single molecule of onion juice, we'd be dead. And you know we would.
It saddens me that I have to explain all of this to a supposedly educated person.