Acute viral hepatitis is inflammation of the liver caused by infection with one of the five hepatitis viruses. In most people, the inflammation begins suddenly and lasts only a few weeks. Symptoms range from none to very severe.
Usually, the 'communication process' is dissemination is one-way. It may form part of a two-way process but this is not implicit in the term. It may also refer to the transfer of research outputs to meet specified demands or requests for 'information'. Definition 19: Dissemination - distribution.
Propagation(noun) the act of propagating; continuance or multiplication of the kind by generation or successive production; as, the propagation of animals or plants. Propagation(noun) the spreading abroad, or extension, of anything; diffusion; dissemination; as, the propagation of sound; the propagation of the gospel.