zoonosis(6) Influenza virus(5) hepatitis E virus(5) Wild boar(4) Seroprevalence(3) animal experimental facility(3) Japan(3) dog(3) Domestic pig(3) Pathogenesis(2) avian viral disease(2) insulated isothermal RT-PCR(2) survival(2) Co-infection(2) antibody(2) Epidemiology(2) influenza A virus(2) real-time RT-PCR(2) DHAV-1(2) wild animal(2) source of infection(2) severe acute respiratory syndrome coronavirus 2(2) calcium hydroxide(2) Human(2) Influenza(2) RT-PCR(2) feces(2) Avian influenza virus(2) Duck hepatitis A virus(2) Sika deer(2)