At this age, the cottontails still cannot live without motherâs milk. 3 day old cottontail (right) next to 14 day old cottontail (left) Seven to Nine Days Old: Similar to a 4-5 day old cottontail, there should not be too much difference at this stage. Eyes should be beginning to open and may look like little slits.
In doing so, the virus destroys the ability of the infected cells to do their job in the immune system. The body then loses the ability to fight many infections. When a person with HIV has an extremely low number of CD4 cells or certain rare infections, doctors call this stage of disease AIDS.
(These cells are also called CD4-positive lymphocytes because HIV uses the protein CD4, present on the surface of the cell, to attach itself and pry its way into the cell.) Each day, your body produces millions of CD4+ T-cells to help maintain your immunity and fight off invading viruses and germs.uman immunodeficiency virus (HIV) infects the cells of the immune system. In particular, HIV attacks and destroys the T helper lymphocytes, or T-cells, which are crucial to the immune system and immune response.