VNA

VNA may refer to:

Medicine

Vagal nerve activity, activity of the vagus nerve which connects the brain to the heart
Ventral anterior nucleus, a nucleus of the thalamus
Vertebral nerve activity, activity of the vertebral nerve, a nerve near the backbone and neck in vertebrates
Virus-neutralizing antibody, antibodies that are specialized to bind to viral components such as viral glycoproteins.
Vendor Neutral Archive, an archive for medical image storage that is independent of the picture archiving and communication system (PACS) that utilizes those images

Value network analysis, a methodology for handling value networks
Vanillylamide of n-nonanoic acid, another name for the capsaicinoid nonivamide
Vector network analyzer, an instrument for electrical circuits analysis, measuring both amplitude and phase properties
Very narrow aisle, a common abbreviation for a type of forklift truck used in warehousing
von Neumann architecture, a design model for a stored-program digital computer, utilized by virtually all modern computers

Vietnam news agency, the official news agency of Vietnam
Vietnamese National Army (1949–1955), the loyalist army in the First Indochina War
Virgin Nigeria Airways, the former name of Nigerian Eagle Airlines, the national flag carrier of Nigeria
Visiting Nurse Association, a type of home healthcare organization