Still flogging the death rate graphs, Menta. That is not a measure of the efficacy of vaccines, the morbidity rate is.
Of course the death rate is falling. As explained to you umpteen times before, the death rate is falling due to the improvement in health care, hygiene, medicines and many other things. We are better able to care for people who have contracted these diseases and are much more capable of keeping them alive. It is the symptoms of these diseases that led to deaths and we can treat the symptoms better with modern medicine.
For instance, the invention of the iron lung and its successor the positive-pressure ventilator reduced the death rate of bulbar polio patients by up to 80%. But it was the vaccines that reduced the morbidity rate.
During the polio epidemics, the iron lung saved many thousands of lives, but the machine was large, cumbersome and very expensive: in the 1930s, an iron lung cost about $1,500—about the same price as the average home. The cost of running the machine was also prohibitive, as patients were encased in the metal chambers for months, years and sometimes for life: even with an iron lung the fatality rate for patients with bulbar polio exceeded 90%.
These drawbacks led to the development of more modern positive-pressure ventilators and the use of positive-pressure ventilation by tracheostomy. Positive pressure ventilators reduced mortality in bulbar patients from 90% to 20%. In the Copenhagen epidemic of 1952, large numbers of patients were ventilated by hand ("bagged") by medical students and anyone else on hand, because of the large number of bulbar polio patients and the small number of ventilators available.
Why do you keep flogging that "death rate" horse when it is not the appropriate measure for the efficacy of vaccines. The morbidity rate is and that shows a dramatic fall following mass vaccination.
