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.
Symptoms of reflux include pain in the middle of the abdomen or chest, nausea, and sometimes even a bad taste in the mouth after eating. This is a very common problem that is often treated with diet modifications such as eating fewer fatty foods, eating smaller meals, and not lying down after eating.