. >> reporter: gerry leone was the district attorney in the lauren astley murder case. >> he didn't like the fact that she broke up with him. >> reporter: he has a message for middle and high school students, especially young men. >> being kind, caring, thoughtful, that's what a real man is. only cowards would put their hands on a woman with mean intent. >> reporter: the white ribbon campaign aims to stop violence before it starts. >> we tell them that the white ribbon signifies men, men standing up against violence against women. i'm going to ask you to stand up with me, if you would. i want them to stand up, i want them to raise their hand, and i want them to commit to being an ambassador; not just for that moment, but they have to continue to not only to talk the talk, but they've got to walk the walk. i promise... >> i promise... >> ...to never commit... >> ...to never commit... >> ...condone or remain silent... >> ...condone or remain silent... >> ...about violence against women. >> ...about violence against women. >> reporter: the statistics are startling. according to the american

. >> reporter: gerry leone was the district attorney in the lauren astley murder case. >> he didn't like the fact that she broke up with him. >> reporter: he has a message for middle and high school students, especially young men. >> being kind, caring, thoughtful, that's what a real man is. only cowards would put their hands on a woman with mean intent. >> reporter: the white ribbon campaign aims to stop violence before it starts. >> we tell them that the white ribbon signifies men, men standing up against violence against women. i'm going to ask you to stand up with me, if you would. i want them to stand up, i want them to raise their hand, and i want them to commit to being an ambassador; not just for that moment, but they have to continue to not only to talk the talk, but they've got to walk the walk. i promise... >> i promise... >> ...to never commit... >> ...to never commit... >> ...condone or remain silent... >> ...condone or remain silent... >> ...about violence against women. >> ...about violence against women. >> reporter: the statistics are startling. according to the american

gerri: take as while, takes a while for the drugs to be tested and to be mass produced. meantime cdc saying today as many as 1.4 million cases of the virus in liberia and sierra leone.e end of the month they will predict from 21,000. we go from 21,000 by the end of the month, to 1.4 million by the end of january. that seems to me an almost impossible trajectory. do you understand the math on that? can that many people be infected? >> answer is yes and the reason that you can have this kind of a disconnect is that the virus that is behind ebola, and there are multiple strains, can change forms. it is a characteristic of viruses that they mutate rapidly. what can happen and what has happened in certain circumstances in the past in our human experience with infectious disease to see that a virus changes from the form that is spread by person-to-person contact or by contact with body fluids, or with contaminants, surface contaminants to aerosolized form. gerri: that is what i'm worried about. >> in the air. that is why you have these eform must difference in projections. the fact is, we have no idea yet what can happen with ebola. gerri: it is really scary stuff. and no