By damaging or destroying the cells of theimmune system, HIV interferes with the body’s ability to effectively fight off viruses, bacteria, and fungi that cause disease. This makes you more susceptible to certain types of cancers and to opportunistic infections the body would normally resist, such as pneumonia and meningitis. The virus and the infection itself are known as HIV. The term acquired immunodeficiency syndrome (AIDS) is used to mean the later stages of an HIV infection.
 

  There are a number of changes and other details taxpayers should be aware of before filing their 2007 returns.