Article 2 Health Care Rationing Humans 2 adult 2 controlled study 2 epidemic 2 epidemiology 2 health care organization 2 human 2 middle aged 2 resource allocation 2 Adaptive Clinical Trials as Topic 1 Adult 1 Africa 1 Africa, Western 1 Age Factors 1 Algorithms 1 COVID-19 1 COVID-19 Vaccines 1 Communicable Diseases, Emerging 1 Computational Biology 1 Computer Simulation 1 Disease Outbreaks 1 Ebola hemorrhagic fever 1 Female 1 Health Personnel 1 Hemorrhagic Fever, Ebola 1 Interviews as Topic 1 Male 1 Mass Vaccination 1