The health of global societies is worsening; this is reflected not only in the increasing prevalence of co-morbidities in the population but also in already registered shortened lifespan. Systems science and the dynamic systems model have been used to study the core issues of unhealthy biologic systems, cascading down to cellular level. The still-evolving COVID-19 pandemic has exposed the vulnerabilities and spiraling penalties of unhealthy lifestyles. Dysfunctional immune system, a boundary, has been put in focus in this study, for its role in not only failing to protect but, through its components breakdown, also cause damage to the entire biologic system of human body; more than the ‘virus’, human decisions, and their impact on health, have been the significant upstream etiology of the pandemic because viruses favor unhealthy cells for their replication. The path to regain health, individually and collectively, is not in new drugs but in inculcating the importance of highly-structured decisions-consequences learning loop; in addition, interval training, spanning intensive physical exercise and selectivity of caloric and sensory input, benefits all levels of living systems-from cells to societies.

health, longevity, immunity, decisions, consequences, hierarchies, training