That's a shocking statistic, isn't it?
I have two quick questions. Could you let us know about the concept of herd immunity and how it's really important to hit that 70% immunization level in order to be able to really retard the spread of the virus?
And secondly, in your professional opinion, if one is vaccinated against H1N1, when the virus mutates, do you anticipate there'll be a cross-reactivity between this virus and its mutated version downstream?