Understanding the Pathophysiology of Drug Addiction Many people don't understand why or how other people become addicted to drugs. They may mistakenly think that those who use drugs lack moral principles or willpower and that they could stop their drug use simply by...

Understanding Stroke​ A stroke happens when a blood clot blocks blood flow to the brain. This causes brain tissue to become damaged or die. A stroke, sometimes called a brain attack, occurs when something blocks blood supply to part of the brain or when a blood vessel...

Herpes Viruses Herpes viruses are pervasive, host-adapted pathogens that cause a wide variety of diseases. The term herpes is derived from the Greek word “to creep or crawl,” and dates back to early Greek civilization, approximately 2000 years ago, in reference to the...

Introduction Herpes is an infection caused by the herpes simplex virus (HSV). The infection is contracted through contact with other persons who have HSV. Herpes may be present in herpes lesions, mucosal surfaces, genital secretions or oral secretions. HSV I and HSV...

Introduction Gastroesophageal reflux disease (GERD) is a disease involving the stomach and esophagus. Reflux occurs when stomach content backs up into the esophagus. Stomach acid then burns the lining of the esophagus which causes heartburn. GERD can be called many...