主题词：HIV Research and Treatment; Hepatitis C virus research; Hepatitis B Virus Studies; Viral gastroenteritis research and epidemiology; Viral Infections and Vectors; Mosquito-borne diseases and control; SARS-CoV-2 and COVID-19 Research; HIV/AIDS Research and Interventions; Respiratory viral infections research; HIV/AIDS drug development and treatment; Herpesvirus Infections and Treatments; Liver Disease Diagnosis and Treatment; Virus-based gene therapy research; Cytomegalovirus and herpesvirus research; Influenza Virus Research Studies; COVID-19 Clinical Research Studies; Viral Infections and Immunology Research; Viral Infections and Outbreaks Research; Animal Virus Infections Studies; interferon and immune responses; Virology and Viral Diseases; Immune Cell Function and Interaction; Viral-associated cancers and disorders; Hepatitis Viruses Studies and Epidemiology; HIV-related health complications and treatments