Immune Systems

Many less people could survive before inoculations were invented. But, there is a price to pay for inoculations and that price is the upper 25% of immune systems. But the payoff is that you can keep alive people with about 25% immune systems to about 75% level of immune systems by giving people inoculations.

So, the way it seems to work it this. Only about 1 billion people could be alive on earth with no inoculations. However, all those people inoculated do not have immune systems in the upper 25% of what is possible just like all people who survived a long time in that past had for thousands of years.

So, though you might have 5, 7, 10, or 14 billion people alive on the planet, none of those who have been inoculated will have the upper 25% of immune systems that people all had who lived a long time before 1900.