The primary cause of GERD is a malfunction of the lower esophageal sphincter. When the lower esophageal sphincter is weakened or not functioning well, it allows stomach acid and food back into the esophagus. This irritates the esophagus, which doesn't have the same, tough lining that the stomach has.When the esophagus is irritated, it can result in heartburn.nderstanding the esophagus and the lower esophageal sphincter and why the lower esophageal sphincter might not be working properly is key to understanding GERD, however. Nearly everyone who has GERD is familiar with its main symptom, burning, uncomfortable heartburn caused by the reflux of acid into the esophagus.
Charlie Sheen reportedly fears he caught HIV from a transsexual. The actor, who revealed last week he'd had the disease for four years, hinted that he had an idea of how he contracted it. A source revealed: Charlie has for a long time had a fascination with Â­transsexual men.
Because there are fewer strains, they are less replicative and transmissible.â. The CCR5 mutation is not the only form of genetic immunity that exists. For example, there are what researchers call âelite controllers,â patients who test positive for HIV but who remain symptom free.nother influential HIV researcher also believes the CCR5 gene mutation is the answer. Dr. Michael Farzan, the Harvard University professor famous for discovering the benefits of CCR5 mutation 16 years ago, told The Guardian heâs close to developing an HIV vaccine based on this genetic immunity.