Engelsk definition
A genus of the family ORTHOMYXOVIRIDAE comprising viruses similar to type C, lacking NEURAMINIDASE and using hemagglutinin-esterase fusion (HEF) protein for attachment. Unlike in other influenza virus genera viral NEP is not produced via alternatively spliced non-structural protein mRNA (NS1). Deltainfluenzavirus mostly infect nonhuman hosts, e.g., cattle and swine and in human causes acute febrile respiratory tract infection. Influenza D virus is the type species.