There is no doubt that rising life expectancy for both sexes is one of humanity’s great achievements and a sign of improved quality of life on Earth. Infant mortality has declined dramatically over the decades, as has mortality among children.
This success in saving the lives of countless children is a source of pride for humanity today, yet often without acknowledging the single most important factor that made children’s lives more resilient against the many diseases that once claimed them.
That factor is vaccination. Its story is one of extraordinary success, beginning in 1796 when the English pioneer of immunology Edward Jenner developed a vaccine against smallpox, a disease that ravaged populations without mercy, killing about 10 percent of people, and in some regions as many as a quarter. Successes followed, with the discovery of multiple vaccines that protected children from polio, measles, and other diseases long responsible for the deaths of thousands throughout history.
For nearly two and a quarter centuries, this success story has transformed the human condition, raising life expectancy. From today through April 30, World Immunization Week, organized by the United Nations, is being observed to raise awareness of the importance of vaccines in saving innocent lives.
Anyone who reflects on the history of vaccines and the greatness of those behind them recognizes that every vaccine we received in our earliest weeks, months, and years of life meant far more than a painful injection that caused a temporary fever. It represented something more profound: preserving human life and equipping each individual with a shield against the body’s vulnerabilities.
What stands out, however, is that this story of nobility and success reached its peak during the first century and a half, followed by a kind of slowdown, as if what had already been achieved in vaccines was sufficient and no longer required further breakthroughs.
What is often overlooked is that the scientists who developed the vaccines that reshaped humanity produced solutions that were, in their time, nothing short of revolutionary. By contrast, today’s scientists have largely focused on refining these existing vaccines, with incremental advances such as combination techniques. Yet today’s challenges demand solutions to conditions such as autism and epilepsy, and especially to deadly diseases that claim 10 million lives annually. These are no less serious than smallpox once was, and they require the same urgency and resolve.
It is also important to acknowledge a painful reality: vaccines developed decades ago remain out of reach for many of the world’s children. Around 14 million children globally have not been immunized. This deprivation of the basic rights to health and life is particularly acute in conflict zones. More than a year ago, global health agencies were prevented from entering Gaza to vaccinate children.
Another striking point is that for many years no new vaccine has emerged that could meaningfully address the complex, accumulated health challenges facing humanity, challenges that require research efforts on par with those that led to the smallpox vaccine in the late eighteenth century.
Major medical breakthroughs have historically focused more on prevention than on treatment. Treatment, by contrast, has become an open market that profits from people’s fear of death and their attachment to life. Prevention, meanwhile, remains far less commercially rewarding.
Today, humanity faces more than one challenge. The first is ensuring that every child in the world, without exception, has access to vaccination. Given the vast number of children deprived of this life-saving right, the United Nations must adopt a more stringent policy, even if that means placing vaccination within the scope of the UN Security Council, as politics and conflict continue to endanger children’s lives and health.
All children must benefit from a revolution more than two centuries old that has subdued deadly infectious diseases through immunization.
The second challenge lies in the stalled momentum of the vaccine revolution. Medical research has shifted toward treating modern diseases, a direction that, in the case of chronic and complex conditions, has often produced management rather than cures. This is evident in autoimmune diseases and genetic cancers. The predominance of limited outcomes in treatment should prompt a reassessment of research priorities, or at least a balance between treatment and preventive vaccines. After the discovery of the smallpox vaccine in 1796, it is reasonable to ask why we have not succeeded in developing vaccines against conditions such as psoriasis, vitiligo, alopecia, and cancers of all types.
World Immunization Week is therefore not only an occasion to raise awareness of vaccines but also an opportunity to hold the medical community accountable for addressing today’s pressing health challenges through vaccine innovation.
