And to crudely compare mass to resource allocation, the article claims more than 1.2kg of immune mass for the 73kg model individual, or 1.6% of total mass. The US military budget is about 3% of GDP.

The resource devotion of most all nation states seems to settle in this 1-3% range, excluding those with more active security tensions. Ukraine for example running an absolute fever at 34% and Israel chronically stressed at 4.5%. https://en.wikipedia.org/wiki/List_of_countries_by_military_...

The middle east in general seems to over allocate on their immune system. This would actually align with what I've been reading recently that modern Islamic culture is much more of a physical might makes right system. And that overspend on aggression and displays of power is part of what hampers their economic vitality while the more peace loving west gets to devote more resources to non destructive pursuits. Turning the other cheek and meeting in the middle is seen as weakness in the Middle East, but it counter intuitively is the reason that the west is the stronger system.

Similarly, those who get their vaccines spend less time sick with their immune system inflamed, and so get to be more productive at work or athletic pursuits and compete better than those that abstain.