fanging viruss coronaviruses cov immunology resembling severity transitional implies prevents endemic manageable reduces pathogens 2020s sars variants infection hosts eradication herd lockdowns vaccination immunity adapting distinction sociological instruments gradual

preventing mortality pandemics phase disruptive graham characterized emergency existing mechanisms pattern intervention roadmap aims total vaccines protection trajectory rates virus gained primarily emergence biological balanced illness healthcare transforming

arguing blending text transition cause collective 19 collapse focuses follows covid pandemic shift tools killer alongside disease defined common management term drive provide period practical david view natural essential