SARS-CoV-2(8) Phylogenetic analysis(5) COVID-19(5) influenza A virus(5) Avian influenza virus(4) Hepatitis B virus(4) antiviral activity(3) virus-neutralizing antibodies(3) Influenza virus(3) hepatitis E virus(2) Subtyping(2) Genome(2) avian influenza A viruses(2) Coxiella burnetii(2) original antigenic sin(2) coronavirus(2) Influenza(2) H8N4(2) bat coronavirus(2) hepatitis A virus(2) sequential influenza A infection(2) Shanghai(2) HBV(2) Antibody Response(2) pangolin coronavirus.(2) HA2-specific antibodies(2) sensitivity(1) inhibitor(1) 2019-nCoV(1) T-705(1)