• cases
  • acquired immune deficiency syndrome , acquired immunodeficiency syndrome an epidemic, transmissible retroviral disease caused by infection with the human immunodeficiency virus, manifested in severe cases as profound depression of cell-mediated immunity, and affecting certain recognized risk groups. (thefreedictionary.com)
  • Simple pain medications are useful in 20% to 70% of cases. (wikipedia.org)
  • complex
  • The International Association for the Study of Pain's widely used definition defines pain as "an unpleasant sensory and emotional experience associated with actual or potential tissue damage, or described in terms of such damage", however, due to it being a complex, subjective phenomenon, defining pain has been a challenge. (wikipedia.org)