Needle Stick Injury Cases. There are about 700,000 Needle Stick Injury cases in the health care setting each year. The injuries are caused by needles such as hypodermic needles, blood collection needles, intravenous (IV) stylets, and needles used to connect parts of IV delivery systems. These injuries may cause a number of serious and potentially fatal infections with bloodborne pathogens such as hepatitis B virus (HBV), hepatitis C virus (HCV), or human immunodeficiency virus (HIV)-the virus that causes acquired immunodeficiency syndrome (AIDS). Needle stick injury cases involve unique factual and leagl issues and they require counsel experienced in this area. If you have been injured by a needle contact a lawyer via our Massachusetts-Lawyers.com here.