A number of scientists with greatly different backgrounds can come up with completely different assessments. The discussions or controversies are endless. Once a year we try to bring the most important discoverers together to exchange their experiences and knowledge.

We've had risk assessments performed by Harvard University which said that even if we did have a small number of cases in this country that the likelihood of it spreading or getting into any kind of human health problem is very very small.

Well I think first of all there was a failure to have real clear information at our disposal. There was a real lack of situational awareness. We didn't have the capabilities on the ground to give us real-time accurate assessments of the physical condition of the city.