SARS-CoV-2(8) COVID-19(5) Phylogenetic analysis(5) influenza A virus(5) Hepatitis B virus(4) Avian influenza virus(4) virus-neutralizing antibodies(3) Influenza virus(3) antiviral activity(3) H8N4(2) bat coronavirus(2) sequential influenza A infection(2) Coxiella burnetii(2) Shanghai(2) hepatitis A virus(2) Antibody Response(2) pangolin coronavirus.(2) HA2-specific antibodies(2) Influenza(2) Subtyping(2) Genome(2) avian influenza A viruses(2) HBV(2) original antigenic sin(2) coronavirus(2) hepatitis E virus(2) molecular docking(1) cerebrospinal fluid(1) vp4 gene(1) H9(1)