The Human Immunodeficiency Virus (HIV) seems to only infect the CD4 (or T-helper) cells of the immune system.The CD4 cells are responsible for activating and directing other â¦ immune system cells.  HIV also infects macrophages and microglial cells that express the CD4 molecule on their surface.The virus can also infect a subtype of myeloid dendritic cells MDC-1. 12 people found this useful.he Human Immunodeficiency Virus (HIV) seems to only infect the CD4 (or T-helper) cells of the immune system.
What is sibling abuse? Sibling abuse is the physical, emotional or sexual abuse of one sibling by another [1]. The physical abuse can range from more mild forms of aggression between siblings, such as pushing and shoving, to very violent behavior such as using weapons. Often parents donât see the abuse for what it is.
A sibling is your brother or sister. It's that simple. The word sibling once meant anyone who is related to you, but now it's reserved for children of the same parent or parents. It is a word that was once out of use but then brought back into English in the early 1900s as a useful word in anthropology. If you and your brother fight all of the time, your parents might call it sibling rivalry. You might just call him annoying and run from the room.