Outbreak
Pandemic
Influenza A virus subtype H5N1
Virology
Highly pathogenic
China
Human mortality from H5N1
Virus
Coronavirus disease 2019 (COVID-19)
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)
Geography
Environmental health
Biology
Medicine
Disease
Infectious disease (medical specialty)
Archaeology
Pathology
