<unk> s are a group of viruses that cause diseases in mammals and birds.<unk> may also refer to: * Severe acute respiratory syndrome<unk> 2 (SARS-CoV-2), a strain that emerged in 2019 *<unk> disease 2019 (COVID-19), the disease it causes * COVID-19 pandemic, the global spread of that disease
Coronavirus 
Arbovirus
Orthohantavirus
Echovirus
Senecavirus
Henipavirus
Pandoravirus
Oncovirus