Background: Immunobiologicals are thermolabile products that require strict storage and transportation conditions to maintain their immunogenic efficacy, particularly in countries where logistical and operational challenges are evident, such as Brazil. Methods: A holistic multiple case study,...

Background: Socio-economic inequality and vaccination inequity have long been critical issues. However, no studies have explored the gap in influenza vaccination uptake between public and private schools. Importantly, the extent to which socio-economic inequality translates into vaccination...

The COVID-19 pandemic posed severe challenges for governments, presenting unknown situations and requiring decisions to be made under unprecedented uncertainty. Scientists responded fast, developing vaccines to mitigate the effects of the disease and improve pandemic management. This study...

We develop a population game with heterogeneous infection-loss types and social-circle mediated prosociality, where altruists internalize expected infection losses within a setting-specific circle. Equilibrium admits closed-form cutoff rules and an aggregate non-vaccination rate that reduces to...