The promoter is all you need for activation and silencing. It's the main site of action where everything is happening. This is the first time anyone has actually been able to infiltrate an antigenic variation program.

The promoter is all you need for activation and silencing. It's the main site of action where everything is happening.

The promoter is all you need for activation and silencing.

This is the first time anyone has actually been able to infiltrate an antigenic variation program. We forced the cell to switch our gene on and others off.

It's like a leopard being able to change its spots. New forms come up, and the immune system beats them down again. Because of this a lot of people think you need five years of constant exposure to malaria in its different disguises to gain immunity.

You get to learn about different cultures-the different parts of the country. The diversity is different. The atmosphere is different. The people are different. You kind of have to change the way you think.