Our Age-Old Argument With Pathogens
As most public health people seem unaware, and many of the public also, let us review why so many of us now reach old age. Humans are constantly exposed to microbes that could cause harm. The vast majority don’t, as our forebears spent hundreds of millions of years evolving defenses against them, even as the microbes evolved new ways to use our bodies to multiply their own. Mostly, we live in harmony with bacteria—our gut is full of them, but they also cohabit in our bloodstream and elsewhere—even possibly in our brain, as is demonstrated in other vertebrates. Most of the cells we lug around are actually not us, but bacteria that live with us.Some microbes (bacteria, viruses, fungi, protozoa) and even small worms of various sorts can, however, cause us great harm (they become pathogens). Their genetic code is, like ours, designed to reproduce itself, and to do this they need to eat part of us or hijack the metabolism of our cells. In doing so, they can sicken or kill us.
The Growth of Human Resilience
So, back to sanitation, nutrition, and living conditions. Relatively recently, we figured out what pathogens are (bacteria, viruses, protozoa, nematode worms, and the like) and better understood how to avoid them altogether. Many of the pathogens that used to kill us spread from person to person through a “fecal-oral” route, as it is euphemistically called. They reproduce within the body, and the resulting multitude move on when we defecate. If someone then drinks water contaminated by that, they get infected. Cholera, typhoid, and E. coli are well-known examples. Beyond aesthetics, this is why we have sewage systems in towns and cities. We stopped most deaths from these pathogens simply by drinking clean water untainted by someone else’s toilet.Pathogens that spread by respiratory routes to cause disease (e.g., influenza, COVID-19) are more likely to pass between people if they live in a confined space with poor air circulation. This raises the chance of breathing in air others have breathed out, and increases the number of organisms that infect us at once (i.e., an infective dose or “viral load”). A high infective dose makes it more likely that we get very sick before our immune system can mount an effective response.
Good nutrition is absolutely essential for us to mount an effective immune response, whether to an organism or a vaccine. The cells in the immune system have specific requirements, such as Vitamins D, K2, C, and E, and zinc and magnesium, and cannot function well without an adequate concentration of them. They can also be impaired in their function when our general metabolism is impaired, such as in diabetes, starvation, or chronic diseases and anemia.
As we have improved access to fresh and varied food over the past two centuries, we have allowed our immune systems to function more optimally. We may still get infected, but we nearly always win the human–pathogen battle.
Over the past few hundred thousand years or so, our ancestors also developed a compendium of plants that, if eaten, helped rid us of the sicknesses that microbes cause. In the past hundred years, our increasing knowledge of bacteria in particular has enabled us to understand their metabolism and develop specific antibiotics to slow their growth or kill them (we also have some against viruses and fungi). Antibiotics have helped enormously, but even they are often useless without a functional immune system. This is why people with no immune cells (e.g., due to cancer treatment) have to remain in sterile tents until immune competence returns.
Gavi and Survival
This brings us back to Gavi—the Vaccine Alliance. This public-private partnership was formed in 2001 at a time when biotech (clever stuff that can profitably help reduce sickness and death) was really taking off, and private finance (especially from very wealthy individuals running rapidly expanding software companies) was accordingly becoming interested in public health. Gavi is solely devoted to supporting the distribution and sale of vaccines to low-income countries. These populations have not undergone the full transition to longer lifespans that improved economies brought elsewhere. Much of its funding is public (taxes), while private pharmaceutical interests help direct its work. Its many hundreds of staff have been successful in getting vaccines to more people more cheaply.Mortality was declining pre-Gavi due to improved nutrition, sanitation, living conditions, and access to antibiotics, as low-income economies slowly improved. We can assume that this decline would have persisted without the addition of mass vaccination (this much is obvious). Disease incidence would have been higher (more pathogens circulating), but the pathogens were becoming less deadly overall as human resilience improved. What we don’t know is whether mass vaccination, and the work of Gavi within this, made much difference. It really may have, helping accelerate the transition to better survival, or it may not have done much at all. Saving a malnourished child from measles so that they die from pneumonia or malaria is not really a saved life, so comparisons between interventions are difficult to make.
First, this would depend on whether there are other mechanisms to distribute vaccines—and of course, there are. Countries could buy and distribute vaccines themselves if given the money directly, without an army of exorbitantly paid foreigners weighing in as intermediaries from Lake Geneva.
Second, the money could be diverted to the basic drivers of improved survival (nutrition, sanitation, and more). This would not only reduce mortality from “vaccine-preventable diseases,” but also reduce mortality from a stack of other ailments for which we don’t have vaccines. It would also improve child performance in education, improving future economies (and health).
Third, without large Western-based agencies with thousands of well-paid Western staff to keep the rest of the world honest, low-income countries would have to find ways to support their own health care. Doing this abruptly could be harmful, but we have actually been on the opposite trajectory for years, steadily building up centralized agencies, non-government organizations (NGOs), and government aid organizations, draining competent people from these countries in the process. Free money also renders efforts of recipient countries toward self-reliance politically hard for their leaders.
Recalling When Honest Public Health Was Not Far-Right
Decades ago, in 1978, the Declaration of Alma-Ata proclaimed the importance of primary health care and community control in effective public health. It was a time when solid “left-wing” values included individual sovereignty (bodily autonomy), decentralization of control, and human rights in general. These were then synonymous with public health. Decolonization was an actual thing, not a filler in the reports of expanding Western-centric agencies. However, while giving others control over their own destiny is easy when one has nothing to lose oneself, it is much harder when it involves sacrificing a generous salary, children’s educational allowance, health insurance, and fun trips on business class.All the incentives for this expanding global health workforce push its participants to support centralized, vertical approaches to public health. To be healthy, people now needed manufactured stuff, and only wealthy, Western-trained people can be trusted to make them have it. Healthy left-wing values are now instilled by rich Western capitalists and multinational corporations, while decentralization, and individual and national sovereignty (i.e., decolonization) are, the media assures us, “far-right.”
The world does not have to be like this. We managed to decolonize, to a large extent, two or three generations ago. Rich industrialists come and go through history, but the basic ideals of equality and truth survive.
We can pretend public health was on the right course prior to the new U.S. administration, and that ever-enlarging “Global Health” workforces in Switzerland and the United States were a mark of this success. Or we can recognize that this was a broken and failing system that was serving big Pharma and the interests of the wealthy.
A new round of decolonization is way overdue. While chipping away at disease by disease with manufactured commodities like vaccines has proven lucrative to manufacturers and the health bureaucracy, it is not building the capacity and independence that offers a way out. Equity and resilience are achieved not by enforcing dependency but through self-determination.
Downsizing Gavi provides an opportunity to turn such endless rhetoric into reality. The public health world should embrace it.







