Common causes of gas and bloating include: 1  Swallowed air. 2  Foods and beverages. 3  Lactose intolerance. 4  Constipation. 5  Medicines or nutritional supplements. 6  A medical condition, such as a bowel obstruction or Crohn's disease. 7  Changes in hormone levels.
HIV and AIDS social issues. In many regions, social issues increase the risk of HIV infection making it difficult to tackle the global HIV epidemic effectively. Certain groups of people are more affected by HIV than others. Sometimes this is because they engage in high-risk behaviours, while others experience stigma and discrimination that stops them from approaching HIV services.
HIV and AIDS. 1  AIDS is an immune deficiency condition caused by infection with the Human Immunodeficiency Virus (HIV) 2  Epidemiology HIV can occur in any population. increased prevalence in hemophiliacs, IV drug abusers, and homosexual men. 3  Pathophysiology the CD4 cells (T-helper cells) are affected.