To protect our eyes from moisture and light. Example: from sweat. It can also reduce the amount of light that gets in your eyes and keep dirt away from them too.
I thought u said renegade not retrograde-
<span> If you were to develop the drug, you would want it to only stop replication in the virus and NOT in the human. Therefore, you want to only block the steps that are unique to the virus. Don't know if that helps, but it's a start.</span>
The only thing the cancers have in common is that they started from a breast tissue cell. They can be different cells that may have different genetic changes.