Q&A: Rethinking immunity beyond 'strong' and 'weak'

Melinda Fagan, a professor of philosophy at the University of Utah, has proposed a novel perspective on understanding immunity in her recent paper. This approach aims to bridge the gap between experts and nonexperts, potentially alleviating vaccine hesitancy in a public that is increasingly science-resistant. Fagan's work is featured in the journal Biology & Philosophy.

The article highlights that the immune system, while crucial for defense, plays a far more complex role in various other body systems such as development and cognition. This complexity necessitates moving away from the simplistic "weak to strong" analogy, as the immune system operates dynamically and co-operates with multiple internal and external systems.

One of the primary social issues Fagan is addressing is vaccine skepticism and hesitancy. She argues that the "strong vs. weak" framing of vaccines can exacerbate these issues. This framing could lead to perceived violations of bodily autonomy and loss of parental authority. Additionally, distrust of science and other powerful institutions, such as the Centers for Disease Control and Prevention, can make vaccines seem like another attempt to control individuals' immunity, much like a muscle that needs constant "exercise" through vaccines.

Fagan's argument also suggests that assuming immunity operates like a muscle could foster a cultural environment of distrust around vaccines. She emphasizes that the immune system is inextricably linked to an individual's life, making it a uniquely personal and irreplaceable aspect of one's biology. The immune system effectively tackles subpersonal problems, extending the organism's life and contributing to its overall health.

Despite its effectiveness, the immune system is not flawless and is specific in its responses, much like a trap springing shut. The immune response is a complex, precise, and adaptive mechanism that solves problems unique to each organism. This complexity is often overlooked when vaccines are considered as merely a way to "strengthen" immunity, leading to potential misconceptions about their role in the body's defense system.