aids aids dementia complex adult t-cell leukemia africa alpaca animal virology antelope aphthovirus argentina asia astrovirus asymptomatic carrier australia avian influenza bbc news biological type bison blood bornholm disease california cattle cervical cancer chicken chickenpox chile common cold continental europe coronavirus cowpox coxsackie b cumbria cytomegalovirus cytomegalovirus retinitis dna dna virus deer disease diseases database dog domestic sheep egham electrocution elephant encephalitis lethargica enterovirus epizootic europe european union exanthem farmers weekly fever fifth disease friedrich loeffler gansu gastroenteritis genetic engineering genital wart goat great britain hiv hebei hepatitis a hepatitis c hepatitis d hepatitis e herpes simplex herpes zoster herpesviridae hsinchu human t-lymphotropic virus human papillomavirus human parainfluenza viruses human respiratory syncytial virus icd immune system infectious disease infectious mononucleosis influenza institute for animal health isle of man tt japan jiangsu lesion llama lymphocytic choriomeningitis lysis measles medical subject headings merial metapneumovirus michigan milk molluscum contagiosum monkeypox mucous membrane mumps myelitis myocarditis new zealand norovirus north america oncovirus picornavirus pig pirbright plantar wart plum island animal disease center poliomyelitis post-polio syndrome poxviridae progressive multifocal leukoencephalopathy protein qinghai rna rna virus rabies republic of ireland respiratory system retrovirus roseola rotavirus rubella serotype serovar severe acute respiratory syndrome sexually transmitted disease shandong shropshire smallpox solihull south america soviet union subacute sclerosing panencephalitis surrey swine vesicular disease taiwan the daily telegraph the guardian tick-borne meningoencephalitis tropical spastic paraparesis united kingdom united states department of agriculture university of manchester uruguay vaccination vaccine vaccinia viral hepatitis viral pneumonia viral skin disease virus classification wart world health organization world war ii xinjiang yak