1.   But as the virus multiplies, the number of T-helper cells Declines and there is increased impairment of the immune system.

2.   Because cancer cells lack the gene, the virus multiplies in them and ultimately destroys them.

3.   Slowly, as the virus multiplied and sapped their immune systems, they began to sicken and die.

4.   The virus multiplies in and often kills birds, the so-called amplifying hosts, and multiplies further in mosquitoes that take blood from birds.

5.   The virus then multiplies and may cause illness.

6.   This last fact means that viruses cannot multiply adequately in human blood to infect the next mosquito that bites.

7.   When a patient is first infected, the virus multiplies rapidly in the body until the immune system is able to get it under control.

8.   Early detection of HIV infection allows a client to seek therapy before the virus multiplies in such proportions that therapy can no longer work.