Filtering by: Organization Network of the National Library of Medicine (NNLM) Remove constraint Organization: Network of the National Library of Medicine (NNLM) Collection Medical Center Library & Archives Posters and Presentations Remove constraint Collection: Medical Center Library & Archives Posters and Presentations Subject COVID-19. Remove constraint Subject: COVID-19. Subject Duke University. Medical Center. Library Remove constraint Subject: Duke University. Medical Center. Library Subject Vaccination. Remove constraint Subject: Vaccination.