Which scientific inventions of the twentieth century have led to a reduction in death rates?
The grouping of blood into various blood groups by Land Steiner in 1900 facilitated blood transfusions and the storage of blood in blood banks for later transfusion.
Penicillin, an antibiotic by Dr. Alexander Fleming in 1928 prolonged lives by treating infections.
The polio vaccine in 1954 by Jona Edwards
Transplant surgery by Dr. Christian Barnard, a South African surgeon 1967 succeeded in prolonging lives of heart patients.
Kidney dialysis machine in 1943 has prolonged lives of kidney patients.
Heart valve in 1996 has prolonged lives through replacement of defective valves.
Anti-retroviral has prolonged lives of aids sufferers.