For viruses, classification is normally based on type of nucleic acid, morphology, presence or absence of an envelope and replication properties. A number of families is recognized, with the family name ending in -viridae, e.g. Poxviridae (double-stranded DNA, enveloped animal viruses).
Heartburn, regurgitation, and dyspepsia are a few of the most common acid reflux symptoms. Heartburn. Also called acid indigestion, heartburn is a burning pain or discomfort that can move up from your stomach to the middle of your abdomen and chest. The pain can also move into your throat.
Other symptoms of acid reflux disease include: Common symptoms of acid reflux are: 1  Heartburn -- a burning pain or discomfort that may move from your stomach to your abdomen or chest, or even up into your throat. 2  Regurgitation -- a sour or bitter-tasting acid backing up into your throat or mouth.