1.   By contrast, more dramatic effects are found in people treated with anti-AIDS drugs that attack the virus directly.

2.   If we are exposed to a measles virus, the immune system will develop antibodies specifically designed to attack measles viruses.

3.   It is a medical problem to attack the virus without attacking the normal cells.

4.   And while some researchers concentrate on drugs that attack the virus, others are seeking drugs to block the pain itself.

5.   At that time, the helper T cells begin to proliferate and signal the killer cells to attack the virus.

6.   But the drugs work in only about half of the cases, so the search has been on for drugs that attack the virus directly.

7.   Other experiments failed when the immune systems of patient volunteers attacked the viruses carrying the gene therapies.

8.   Pallansch attacks the virus with antibodies known to kill specific types of polio.