South Korea eyes expanded vaccination strategy beyond infectious diseases

South Korea is grappling with an aging population, with nearly half its citizens over 50. This demographic shift intensifies the need for preventative healthcare, as declining immunity in middle-aged and older adults can lead to serious health issues beyond mere inconvenience, including hospitalization, worsening chronic conditions, and reduced quality of life. Infections like influenza, pneumonia, and shingles pose significant risks.

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As the body's cells age, the immune system also ages, a phenomenon known as immunosenescence. As immunosenescence progresses, the possibility of viruses latent in the body reactivating increases. Shingles is a prime example.

In response, a bill to establish a comprehensive vaccination management system was recently introduced in the National Assembly. Proposed by Representative Han Ji-ah, the bill seeks to place the entire vaccination process, from planning and execution to managing adverse reactions and compensation, under state responsibility. While the medical community generally supports the bill's intent to create a systematic framework, some experts believe it falls short by remaining centered on infectious diseases.

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The establishment of the Vaccination Management Act itself is very welcome. The direction of the state taking responsibility from planning to implementation, adverse reaction response, and compensation is clearly a progressive change.

Kim Cheol-min, Director of the Korean Academy of Family Medicine, emphasizes that vaccination acts as a crucial lock protecting health. He points out that immunity naturally declines with age, a process known as immunosenescence. This decline increases the likelihood of latent viruses reactivating, with shingles being a prime example. The age of 50 is identified as a critical turning point, marked by hormonal changes in women and an increased incidence of chronic diseases and cancer in men. Therefore, regular health check-ups and adherence to adult vaccination schedules are vital.

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However, there is also regret. Although the bill uses the term 'infectious diseases,' it is limited to legal infectious diseases that can be transmitted between people, that is, communicable diseases.

Kim advocates for expanding the scope of the proposed law beyond just infectious diseases. He suggests including other vaccine-preventable conditions, such as those caused by the Epstein-Barr virus (EBV), recurrent urinary tract infections linked to E. coli (UPEC), and Clostridioides difficile colitis. Such an expansion, he argues, would not only reduce the national healthcare burden but also align with a proactive approach to healthcare, akin to a skilled baseball player anticipating plays rather than just reacting to them. He also addresses the practical challenges in current vaccination practices, including the need for doctors to proactively recommend vaccines, overcome patient hesitancy or suspicion, and establish a robust state-backed system for managing rare adverse reactions. Furthermore, he highlights the financial aspect, noting that many developed nations offer public support for costly vaccines like the shingles vaccine, and South Korea should explore similar cost-sharing models to promote wider vaccination uptake.

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The pain of shingles is very severe. Some patients describe it as more painful than childbirth.