Layered Shields: Multiscale Prevention of Seasonal Viral Diseases

Abstract

Seasonal viral diseases such as influenza, respiratory syncytial virus, rhinovirus, and seasonal coronaviruses remain leading causes of morbidity, mortality, and health‑system strain worldwide, despite the experience gained during the COVID‑19 pandemic. Prevention now demands an integrated, “layered shields” strategy that combines vaccines, antivirals, non‑pharmaceutical interventions, environmental measures, and host‑directed approaches tailored to risk groups and settings This narrative review synthesizes emerging evidence on climatic and behavioral drivers of seasonality, host–virus–environment interactions, and scalable interventions from community to long‑term care and hospital settings We highlight how immunization, respiratory hygiene, ventilation, and early outbreak detection can be orchestrated into anticipatory preparedness cycles rather than reactive outbreak responses Finally, we outline research priorities for optimizing vaccination schedules, leveraging digital surveillance, and mitigating complications through host‑directed prevention in vulnerable populations such as children, older adults, and immunocompromised patients