Heterologous
Vaccination
Coronavirus disease 2019 (COVID-19)
Pandemic
Virology
2019-20 coronavirus outbreak
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)
Prime (order theory)
Medicine
Vaccine efficacy
Immunology
Biology
Mathematics
Outbreak
Disease
Internal medicine
Infectious disease (medical specialty)
Biochemistry
Combinatorics
Gene
